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Effects of a Whole Body Compression Garment on Markers of Recovery After a Heavy Resistance Workout in Men and Women

Kraemer, William J1,2; Flanagan, Shawn D1; Comstock, Brett A1; Fragala, Maren S1; Earp, Jacob E1,4; Dunn-Lewis, Courtenay1; Ho, Jen-Yu1; Thomas, Gwendolyn A1; Solomon-Hill, Glenn1; Penwell, Zachary R1; Powell, Matthew D1; Wolf, Megan R1; Volek, Jeff S1; Denegar, Craig R1,3; Maresh, Carl M1,2

Journal of Strength and Conditioning Research: March 2010 - Volume 24 - Issue 3 - p 804-814
doi: 10.1519/JSC.0b013e3181d33025
Original Research

Kraemer, WJ, Flanagan, SD, Comstock, BA, Fragala, MS, Earp, JE, Dunn-Lewis, C, Ho, J-Y, Thomas, GA, Solomon-Hill, G, Penwell, ZR, Powell, MD, Wolf, MR, Volek, JS, Denegar, CR, and Maresh, CM. Effects of a whole body compression garment on markers of recovery after a heavy resistance workout in men and women. J Strength Cond Res 24(3): 804-814, 2010-The primary purpose of this investigation was to evaluate the influence of a whole body compression garment on recovery from a typical heavy resistance training workout in resistance-trained men and women. Eleven men (mean ± SD: age, 23.0 ± 2.9 years) and 9 women (mean ± SD: age 23.1 ± 2.2 years) who were highly resistance trained gave informed consent to participate in the study. A within-group (each subject acted as their own control), balanced, and randomized treatment design was used. Nutritional intakes, activity, and behavioral patterns (e.g., no pain medications, ice, or long showers over the 24 hours) were replicated 2 days before each test separated by 72 hours. An 8-exercise whole body heavy resistance exercise protocol using barbells (3 sets of 8-10 repetition maximum, 2.0-to 2.5-minute rest) was performed after which the subject showered and put on a specific whole body compression garment one designed for women and one for men (CG) or just wore his/her normal noncompression clothing (CON). Subjects were then tested after 24 hours. Dependent measures included sleep quality, vitality rating, resting fatigue rating, muscle soreness, muscle swelling via ultrasound, reaction movement times, bench throw power, countermovement vertical jump power, and serum concentrations of creatine kinase (CK) measured from a blood sample obtained via venipuncture of an arm vein. We observed significant (p ≤ 0.05) differences between CG and CON conditions in both men and women for vitality (CG > CON), resting fatigue ratings (CG < CON), muscle soreness (CG < CON), ultrasound measure swelling (CG < CON), bench press throw (CG > CON), and CK (CG < CON). A whole body compression garment worn during the 24-hour recovery period after an intense heavy resistance training workout enhances various psychological, physiological, and a few performance markers of recovery compared with noncompressive control garment conditions. The use of compression appears to help in the recovery process after an intense heavy resistance training workout in men and women.

1Human Performance Laboratory, Department of Kinesiology; 2Department of Physiology and Neurobiology, and 3Physical Therapy Program, University of Connecticut, Storrs, Connecticut

The results of this study do not reflect any endorsement by the National Strength and Conditioning Association.

Address correspondence to William J. Kraemer, William.Kraemer@uconn.edu.

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Introduction

Quicker recovery from conditioning protocols and sport competitions is thought to be an important factor in successful training protocols or sport performance (1,5,6,11,41,42,57,60). Each exercise protocol or sport competition can result in various magnitudes of alterations in physiological or psychological or both alterations (e.g., increased soft tissue damage, increased fatigue states, increased core temperature, and so on) (16,37,61). The rapidity of recovery can be influenced by many factors including genetics, diet, fitness level, sleep, environment, winning or losing, and the magnitude of the physical/psychological trauma. Thus, the exercise demands and the recovery processes are specifically related to the stressors the athlete or individual is exposed to. Historically, due the importance of recovery a host of exercise, legal and illegal restoration techniques have been used by athletes (e.g., anabolic drugs, over-the-counter medications, cryotherapy, electrical stimulation, dietary supplements, vibration, hypnosis, and so on)(1,3-6,20,21,23,32,40-42,45,46,57,63). Over the past several years, the use of compression garments has now been viewed as a potential “tool” in the array of restoration techniques employed (11-13,27,28).

The underlying mechanisms by which compression garments mediate any beneficial effects need to be carefully understood to understand if the garment characteristics match the needs of the individual. With the many variations in garment fitting, design, and construction, not all garments have the same constitutive properties. Customized garments for various specific functions are becoming more popular (e.g., swimmers wear a specific compressive garment for improving their speed in the water). Each garment construction potentially interacts differentially with the psychological and biological interfaces with the human and his/her various recovery variables. The lack of effects typically revolves around the mismatch of the garment to the desired function (e.g., low compression and proprioception) or compensatory effects by other endogenous (e.g., anabolic hormone signaling) or exogenous (e.g., drug therapy) operational systems. Several basic mechanisms mediate a garment's capability to achieve any measurable positive benefit.

The first mechanism that allows for optimal use is proper fit (24). With high compression or with compression used to treat extreme soft tissue injury, compression may augment feelings of discomfort during the period the garment is used despite the positive results because of mechanical blocking of edema (27,28,59). Nevertheless, proper fit (e.g., seams not problematic or constrictive and compression relief in areas of high sensitivity) and feel (e.g., garment material) are the first mechanisms that set the stage for its effects especially with long-term wear. Garments range from low compression worn for fashion and look (e.g., low Lycra or spandex content) to high compression worn for mechanical support (e.g., power lifting bench shirt) (59) and demonstrate the importance of the compression levels created by the Lycra or spandex content and construction design (39). Compression (e.g., 24-27%) and construction create the potential for optimal skin contact, which is vital for proprioception (kinesthetic sense), which mediates many of the garments performance effects (24-26,54). It is vital that garment movement is minimal and stays in contact with the skin, so no air bubbles are produced breaking the special linkage with the stimulation of skin receptors. Optimal compression also allows the body structures to be held in place reducing the amount of movement and oscillation upon contact or allows limbs to be kept in anatomical positions when not used allowing straight-line tissue repair geometrics (25,27,28). This may be very important in locomotion tasks where greater distance and faster velocities of during actual game performance but not with classic speed tests have been observed (19). Compression has also been linked to enhancing the “muscle pump” allowing blood return to the heart for removal of waste products (7,39). Finally, mechanical support is needed when added force is required for a movement, and this seems possible only with high compression and material mechanics not optimal for anything but short-term use (59).

The use of compression garments as a recovery tool appears to be related to the repair of tissue unless extreme tissue damage has occurred when performance might then be influenced (11-14,27,28). Most conditioning (e.g., when not an overtraining stimuli) (17,18,56) sport competitions (e.g., college football game) (38) do not reach the level of damage when traumatic injury is not present impacting performance except when extreme eccentric exercise or endurance events (e.g., marathon) are performed (2,9,43). We hypothesized that a compression garment worn after a conventional whole body heavy resistance workout would enhance the recovery process (11,27,28). Thus, the purpose of this investigation was to examine the effects of wearing a whole body compression garment after a whole body heavy resistance training workout on psychological and physiological and performance variables after 24 hours of recovery.

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Methods

Experimental Approach to the Problem

To examine the effects of the compressive garment, we used a within balanced and randomized treatment design with each subject acting as their own control. We used a 2 treatment experimental design consisting of a specifically designed garment for men and women and a control condition of apparel, which had no compressive elements to them. Extensive familiarization for each subject was undertaken to reduce experimental variance. This familiarization consisted of verbal overviews and demonstrations of testing procedures; testing practice; careful explanation of scales; dietary screening with a registered dietician; and instructions on how to replicate diet, activity, and behaviors before and during the 24-hour recovery period for each testing visit. To simulate a typical conditioning session, a whole body heavy resistance exercise protocol was used that would stimulate a great deal of muscle tissue because of the higher force requirements for motor unit recruitment and metabolically be very challenging (e.g., elevate blood lactate, reduce pH, and produce release of free radical formation). We also used resistance-trained men and women familiar with the workout style because of their own periodized training to limit atypical or novel physiological responses to the workout protocol. We then evaluated the responses of the garments by having them put on the garment after the workout and then test 24 hours later after taking the garment off. Thus, the role of the compressive garment was the experimental treatment effect to be evaluated in this experimental design (Figure 1).

Figure 1

Figure 1

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Subjects

The investigation was approved by the University of Connecticut's Institutional Review Board for use of human subjects in research. Each subject had the experimental risks and of the study explained to them and subsequently gave written informed consent to participate. The subjects used in this investigation were considered resistance trained each participating in a their own periodized heavy resistance training program for at least the past 2 years, which included the type of protocol used in the study. Many of the subjects had been elite collegiate athletes as well. The subject's characteristics were as follows: Men (n =11) (mean ± SD: age [years] 23.0 ± 2.9, height [cm] 178.5 ± 9.9, body mass [kg] 86.1 ± 9.7) and trained women (n =9) (mean ± SD: age [years] 23.1 ± 2.2, height [cm] 161.6 ± 6.2, body mass [kg] 59.5 ± 5.5). Men were both significantly (p ≤ 0.05) taller and had a higher body mass than women. Each subject considered healthy was medically screened by a physician as having no medical conditions that would confound any of the experimental variables. A registered dietician also screened each subject for dietary habits and instructed them on replicating diet profiles for the 2 days before the study and during the 24-hour recovery period. Each subject was instructed on proper water behavior to ensure normal hydration status for all testing because hypohydration has been shown to impact physiological responses and performance (22). Each subject had their garment properly fitted, assuring that the compression levels were appropriate and that garment fit properly per the sizing requirements.

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Procedures

We relied on a thorough familiarization period to reduce any learning effects and allow the subjects a thorough understanding of the testing protocols, experimental requirements, control conditions, and the different clinical rating scales that were used. Each subject was asked to drink 0.5 liters of water the night before and morning of recovery visit to standardize hydration status. In addition, diet and activity profiles were maintained for 48 hours before the experimental resistance exercise protocol day. Food and beverage choices were standardized throughout the study. The diet repetition protocols consisted of a 48-hour period, which began 24 hours before exercise session and lasted until 12 hours before recovery testing session, which marked the beginning of a 12-hour fasting period. Additionally, subjects were instructed to abstain from exercise outside of the study and drinking more than 2 cups or servings of caffeinated or alcoholic beverages during dietary control period. Subjects were instructed to continue any supplement regimens (e.g., vitamins and so on) in use before study and to not discontinue or begin consumption of any new supplement during the study. Subjects met with registered dieticians to ensure that standardized dietary practices did not provide reason to suspect adverse effects on recovery capability (i.e., insufficient caloric consumption). Subjects replicated all behaviors for each testing phase from use of activity and nutrition logs to reduce variance in experimental measures. All experimental tests were practiced and pilot tested before beginning experimental data collection. To minimize variance associated with intertester variability, each experimental procedure was administered by same research team.

The 8-10 repetition maximum (RM) load for each exercise used in the workout was determined during the familiarization phase of the study under the context of performing the total workout as previously described for performing total workout sequence loading (35). In addition, subjects were trained with the protocol and loads for several workouts during the familiarization phase to reduce the novelty and assure similar physiological responses each day.

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Resistance Exercise Protocol

Each subject reported to the laboratory to perform the heavy resistance exercise protocol. This protocol was chosen because it would produce a dramatic whole body demands metabolically and stimulate a large amount of muscle mass and create a typical workout challenge in men and women. Upon entry into laboratory, it was confirmed that subjects adhered to experimental controls (i.e., no medications, alcohol, hydrotherapy, long showers, and so on), a 12-hour fasting state, hydration status normal, standardized diet, and had not exercised (22,27,28,34). The 2 series of exercise/recovery sessions were typically completed per week, with at least 72 hours separating each exercise session. Because all subjects acted as their own control, each subject was scheduled at the same time in the morning to perform the resistance exercise protocol. Upon arrival at the exercise facility, subjects completed a standardized warm-up, consisting of 5 minutes of stationary cycle ergometer pedaling at 60-65 rpm, immediately followed by various dynamic stretching exercises.

Following warm-up, subjects completed a standardized free weight resistance exercise protocol incorporating the following 8 exercises (in order) (Figure 2):

Figure 2

Figure 2

  1. Back squats
  2. Bench press
  3. Stationary lunge
  4. Bent-over row
  5. Romanian dead lift
  6. Biceps curl
  7. Sit-up
  8. High pull from a hang

Each exercise incorporated 3 sets using the 8-10 RM zone load. Two and a half minutes of rest were given between sets and exercises. Subjects were encouraged to drink water ad libitum. Upon completion of the exercise protocol, subjects were escorted to a locker room, where they showered and changed into either their normal garments without compression or the whole body compression garment. Subject showered and changed into the garment or noncompressive cloths within 20 minutes of the exercise protocol. The compression suits were male- or female-specific UnderArmour® Recharge™ whole body compression suits constructed to produce needed compression and allow long-term wear with comfort (75% nylon and 25% spandex [Under Armour®, Baltimore, MD, USA]) (Figure 3).

Figure 3

Figure 3

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Recovery Testing

Again upon reporting to the laboratory, each subject's hydration status and adherence to controls were confirmed. Garments were removed, and each subject dressed in standard workout attire for testing.

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Ultrasound Analyses

Using Acuson 13.0-MHz linear array transducer and an Aspen cardiac ultrasound imaging system (Acuson, Elmwood Park, NJ, USA) vastus lateralis swelling thickness and distal patellar tendon thickness were measured per previously referenced techniques (33,44,47). Accuracy and precision of measurements were optimized by the use of permanent marker for exact replication of measurement sites throughout the study. Anatomical references were also used to ensure precision of measurement sites. The same technician conducted all tests throughout the study. The technician administering ultrasound, making the measurements, and analyzing the results was not aware of the specific garments worn by each subject during the recovery period.

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Psychological Questionnaires and Scales

While standing, subjects were palpated over various muscle groups and rated their perceived soreness on a likert scale of 0 (none) to 10 (maximum possible) for each respective palpation. Subjects then sat and completed 3 perceived muscle soreness/pain scales: one likert 5-point soreness scale for different body parts and a perceived soreness/pain was measured using a visual analog scale (VAS) consisting of a 10-cm line labeled from left (no soreness) to right (extreme soreness) (27,28,34). Subjects also completed one 10-point general fatigue scale, one Profile of Mood States scale, a 6-point vitality scale, and one sleep scale/log (8,15,17). Subjects were given as much time as needed to complete the scales, as needed, and external disturbances and distracters were limited.

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Blood Sample

A blood sample was obtained via sterile technique from the antecubital vein using a 20-gauge needle and vacutainer. Blood samples were obtained under resting and 12-hour fasted conditions with all subjects sitting rested for 10 minutes before draw time. Blood was centrifuged at 3,000 rpm and 4°C, plasma was aliquoted into specimen, and tubes were stored at −80°C before analyses. Upon completion of blood draw, subjects were escorted to performance testing laboratory and were given a standard breakfast bar (Advocare International, Carrollton, TX, USA) to eat and to drink water before the remaining testing procedures. Plasma was analyzed in duplicate for creatine kinase (CK), lactate dehydrogenase (LDH), and clinical chemistries using standard automated clinical assays by a reference laboratory (Quest Diagnostics, Storrs, CT, USA).

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Circumference Measurements

To assess edema resulting from strenuous resistance exercise, circumference measurements of various muscle belly regions were obtained per previously described methods (27,28,34). Measurement points were marked with a permanent marker at the beginning of the study and remarked throughout the study to ensure precision of measuring sites. Circumference measures of the upper arm, forearm, upper leg, lower leg, and ankle were taken using a spring-loaded flexible tape measure. The dominant arm and leg were used for all measurements, and all measuring points represented the areas of greatest circumference on each respective limb area.

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Movement-Reaction Time

A novel test was used to determine the composite movement-reaction time using a ruler drop-quick pinch method. While standing with the lower aspect of dominant arm supported on the marked corner of a standardized table top with a neutral hand position, the tester positioned a meter stick directly above the top of the thumb and index finger in an open prepinch position (approximately 1-inch gap between fingers). Unannounced, the tester would then drop the ruler with the subject pinching and stopping ruler as quickly as possible. The distance the ruler fell between thumb and index finger before being stopped was recorded at the top of the thumb. Three trials were conducted with the best score used for analysis.

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Countermovement Vertical Jump

After warming up (using exercise protocol), a 10-repetition countermovement jump was conducted to assess peak power, average power, and maximum performance decrement in lower-body jumping. A Tendo Linear Transducer cord was attached to a belt-like waist wrap, over the spine. Subjects stood over the top of the transducer, facing away with feet shoulder width apart and hands placed on hips. Subjects were instructed to exert maximum effort on every jump and not pace their jumps. Ten jumps were completed in a continuous fashion under a self-controlled cadence with no breaks between repetitions.

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Bench Throw and Squat Jump

The bench throw and squat jump performance tests on a laboratory modified smith machine (Life Fitness World Headquarters, Schiller Park, IL, USA.) were conducted to assess the effects of each compression garment on peak upper- and lower-body power production. Force, power, and velocity were assessed using an AMTI force plate (Advanced Mechanical Technology, Inc., Watertown, MA, USA) and linear transducer in combination with a Myotest wireless accelerometer (Myotest Inc., Royal Oak, MI, USA) that was placed on the bar being lifted. Load was based on body mass at the familiarization visit and kept constant throughout the study to remove variance of findings as a result of different loading schemes. Resistances were set at 20% of body weight on the bench throw and 50% of body weight on the squat jump. Subjects completed 3 separate repetitions (assumed fully extended or standing position before beginning each repetition) in each of 2 sets. Subjects were given as much time as needed before feeling ready to begin second set. Subjects were given standard verbal reinforcement throughout attempts. Upon completion of each set, peak force, peak velocity, and peak power measures were recorded with the best scores used for analyses.

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Statistical Analyses

These data are presented as means ± SD. Statistical power was determine to range from 0.86 to 0.96 for the n size used in the study (nQuery Advisor; Statistical Solutions, Saugus, MA, USA). Reliability range for the dependent variables intraclass correlation coefficient was R ≥ 0.85. We met all statistical assumptions for linear statistics. Any variables that did not meet this assumption were logarithmically (log10) corrected and tested again. An independent t-test was used to compare demographic characteristics between men and women. The statistical evaluation of the experimental data was accomplished using a 2-way analysis of variance for treatment condition and sex. When appropriate, Fisher's LSD post hoc tests were used to determine pairwise differences. A p ≤ 0.05 was defined as being statistically significant.

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Results

The results of this study demonstrated that in both men and women, compressive garments influence positive effects on recovery in various physiological and performance profiles. It was important to remember that these were trained subjects used to hard training and our experimental protocol was used to elicit both mechanical and chemical stressors to the body's recovery process, albeit prophylactic resistance in subjects to such a physical challenge exists because of their prior training (48). Yet this was thought to be the populations most in need of recovery enhancements (e.g., training athletes and active individuals). Figures 4 and 5 present several of the primary variables that were positively affected by the use of the compression garments.

Figure 4

Figure 4

Figure 5

Figure 5

On the 10-point generalized muscle soreness scale, ratings were significantly lower in both men and women with the use of the compression garments. Men experienced significantly higher soreness levels than women in the noncompression condition. No differences were observed for the compression garment conditions (Figures 4A and 5A). This was replicated in the general soreness VAS scale ratings. Interestingly, the 5-point likert scale ratings showed no differences in limb and body part soreness ratings but a significantly lower rating for the composite torso ratings for the right and left sides of the body in both men and women (men: 0.50 ± 0.2 garment vs. 1.6 ± 0.4 control and women: 0.56 ± 0.3 garment vs. 0.96 ± 0.4 control).

The bench throw demonstrated a significantly higher performance level with the use of the compression garments compared with the control conditions (Figures 4B and 5B). Men showed the expected significantly higher values compared with women. No significant differences were observed for the countermovement vertical jump for peak power, average power, and maximum performance decrement between conditions, but again expected sex differences were observed in power outputs. No significant differences were observed between the treatment conditions for the reaction/movement times. No significant differences were observed for the squat jump, albeit expected sex differences existed for force and power outputs.

The amount of swelling determined via ultrasound techniques was significantly lower in the thigh in the compression garments vs. that in the control conditions. No sex differences were observed (Figures 4C and 5C). No significant differences were observed in the patella thickness values under either condition but men had significantly higher values. No significant differences in limb circumferences were observed.

Vitality ratings were significantly higher with use of the compression garment compared with those under the control conditions (Figures 4D and 5D), and no sex effects were noted. Fatigue ratings were significantly lower in the compression garments than under control conditions in both men and women, and no sex effects were noted (Figures 4E and 5E). No differences were observed in any of the other mood states between treatment conditions. Sleep ratings with 0 meaning very light sleep and 10 meaning very good sleep quality were not significantly different between conditions (women: garment, 7.1 ± 2.3 vs. control, 7.6 ± 1.9 and men: garment, 5.1 ± 2.0 vs. control, 5.4 ± 2.5), although men showed significantly lower quality of sleep for both conditions compared with women.

Creatine kinase values were significantly lower at rest 24 hours after the workout after wearing the garment compared with the control conditions for both men and women. Men also showed significantly higher values under both conditions (Figures 4F and 5F). Lactate dehydrogenase values reflected this same response pattern. As expected with the nutritional controls, all the values for clinical chemistries (electrolytes, proteins, and so on) were in normal ranges and not significantly different between treatments or were any sex differences noted.

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Discussion

The primary findings of this investigation were that the use of a whole body compression garment did produce more rapid recovery of selected psychological, perceptual, physiological, and performance variables when compared with the use of a noncompression treatment condition over a 24-hour recovery time frame. However, not all parameters were affected. This was most likely because of the very specific stresses of the workout interacting with the magnitude of damage, damage geometry on specific surface areas, and the differential recovery kinetics of the variables examined in this investigation using resistance-trained subjects (51,52). The resistance exercise protocol incorporated whole body exercises, with relatively high volume, and short-moderate rest periods to produce significant neuromuscular recruitment, metabolic and hormonal responses (29-31,35,36). We used a 24-hour recovery period because many athletes or highly active individuals want to be ready to train or compete within this time frame (16).

In trained men and women, an exercise stress is highly specific to the workout demands (16). Soreness ratings were significantly reduced in the upper torso when using the whole body compression garment. However, no changes were observed in the upper-body arm soreness levels. This might not be surprising with the use of resistance-trained subjects who have had extensive exposure to heavy eccentric loading (9,48,50,52). Interestingly, the bench throw performance was also significantly improved with the use of the whole body compression garment, reflecting enhanced recovery from the neuromuscular deficit created by the workout stress in the upper body.

Although there were sex differences for magnitude of power production and also in the levels of muscle soreness and damage, a remarkable identical response profile of men and women was observed when comparing the whole body compression garment and control treatment conditions. It has been proposed that women may be protected in some ways by their sex from muscle damage because of estrogen biology, other hormonal and cytokine factors, and some inherent muscle/connective tissue characteristics in contraction dynamics (10). We did observe lower damage markers, but this may have been because of the differences in the absolute volume of work and the forces used by the trained men vs. the trained women in this resistance training workout protocol. Interestingly, the same relative stress and response patterns for the different variables indicate that the workout was successful in producing an identical and relatively specific exercise stress in these resistance-trained men and women. Furthermore, the whole body garment construction was apparently successful in mediating the same successful recovery pattern for both men and women.

Interpretation of indirect measures of soft tissue damage might be warranted (49). However, we have recently shown that the magnetic resonance images of damage and CK markers responses of muscle damage followed a similar pattern (34). Clinical evaluation of muscle tissue damage was assessed biochemically with the standard measurements of total enzyme concentrations (i.e., CK and LDH). Here, again the use of a whole body compression garment demonstrated significantly lower 24-hour CK and LDH concentrations compared with the control conditions. Control concentrations of these enzymes were well below high-damage or overtraining concentrations (18), marathon recovery values (2,43,58), or eccentric damage responses (48,49), yet somewhat similar to the recovery observed from an American college football game (38). Thus, the compression garment used reduced the level of CK and LDH, indicating enhanced repair throughout the body's musculature even at lower levels of soft tissue damage. Davies et al. (11) observed reductions in soreness at 48 hours after repetitive maximal drop jumps but no differences in CK concentrations comparing compression vs. control conditions. This may have been because of the rapid recovery of tissue for the specific exercise stress the athletes were exposed to similar to this study and effects were missed at the 48-hour time point. Our findings of enhanced soft tissue repair with the use of compression might be well because of some limited immobilization (62) or more likely the limitation of extra movements with compression holding the limbs in what has been called “dynamic casting” effective in reducing soft tissue in damage repair studies (27,28). This might have also been an important factor in limiting the amount of excessive movement and impact oscillation of the body's musculature during normal activities and locomotion performed during the waking hours, which has been shown to be an important aspect of compression's mechanical characteristics at the compression levels used in the garments in this study (25). Interestingly, even with the use of the garment, sleep quality was not affected and if limbs were kept in a more elongated anatomical position, repair might have also been more geometrically optimized for repair.

Although no soreness ratings of the thighs were observed between the compression garment and control garment conditions, we did observe significantly lower ultrasound measures of muscle swelling in comparison with the control garment conditions. Prior research by Nosaka et al. (53) demonstrated that soreness might not represent the amount of muscle tissue damage that might be present. Paradoxically, the performance variables involving the lower-body musculature were not affected by the workout to the extent observed in the upper body, but the ultrasound data demonstrate that tissue damage was present (47). Still, the compression effects of a lower amount of ultrasound-measured swelling was observed and demonstrated the effects of dynamic casting even in the thighs, which may also have contributed to the lower chemical damage markers as well (27,28). Additionally, lighter and moderate compression has also been shown to reduce venous blood pooling assisting the muscle pump in returning blood to the heart (39,55). A combination of such mechanisms might have been mediating mechanisms for faster lower-body repair and performance maintenance.

One salient feature that coincided with the reduction in overall general soreness/pain perceptions was the improvement in the vitality ratings along with the lower fatigue ratings with the use of the whole body compression garments. Lower perceived soreness ratings have been a prominent finding for the use of compression garments during a recovery period after an exercise stress (11-14). The feelings of reduced fatigue and vitality may well have been because of the garment removal after 24 hours but might also reflect the gestalt of lower amounts of soft tissue damage as well. Nevertheless, such feelings are important for exercise readiness (32). It had been previously noted in extreme damage repair conditions, and use of a compressive sleeve resulted in greater discomfort over the first 24 hours and it produced a dramatic reduction in edema because of water being pushed out of the tissue biocompartment into the circulatory biocompartment via the compressive mechanical blocking (27,28). Such a perceptual response was not observed in this investigation because reductions in soreness, improved vitality, and reduced fatigue ratings were observed within 24 hours, indicating more rapid recovery responses than with severe soft tissue damage conditions. Thus, extreme soft tissue damage might produce higher levels of discomfort when the compression prevents muscle expansion, which was not observed in the limbs with this exercise stress. Recovery from a typical conditioning training session in trained men and women was ultimately enhanced with the use of a whole body compression garment.

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Practical Applications

The practical applications of this study appear to demonstrate the efficacy of a whole body compression garment when recovery enhancement is needed after a typical heavy resistance training workout. Reductions in muscle soreness and tissue damage appear to mediate enhanced performance and less fatigue and greater vitality. One can speculate that whole body compression garments used in this study may be useful in helping recovery with demanding tissue disruptive conditioning sessions or competitive events.

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Acknowledgments

We would like to thank a dedicated group of volunteers for this study, our laboratory support staff, our research assistants, and our physician and medical monitor, Dr. Jeffery M. Anderson, for his medical supervision of this study. This study as supported by a grant from Under Armour®, Baltimore, MD, USA.

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Keywords:

power; restoration; muscle damage; repair; soreness; mood states

© 2010 National Strength and Conditioning Association