Medicine & Science in Sports & Exercise:
A-43 Free Communication/Poster - Sports Equipment: JUNE 1, 2011 7:30 AM - 12:30 PM: ROOM: Hall B
Roper, Jenevieve; DeMattei, Matt; Santo, Antonio; Dufek, Janet FACSM; Mercer, John FACSM
University of Nevada, Las Vegas, Las Vegas, NV.
(No relationships reported)
Many people are interested in ways they can get in shape without having a workout routine. Therefore, a category of walking shoe that is characterized as a soft shoe with a rocker bottom has recently become popular. It may be that using shoes such as this result in greater muscle activity when compared with normal shoes either due to the shoe characteristics or due to the weight of the shoes.
PURPOSE: To determine if muscle activity is influenced by wearing Shape-Ups and/or walking with heavier shoes.
METHODS: Six female subjects (Age: 25 ± 7.2 yrs; Height: 1.66 ± 0.03 m; Mass: 65.45 ± 8.53 kg) participated in the study. Muscle activity of the right bicep femoris (BF), rectus femoris (RF), tibialis anterior (TA), and medial gastrocnemius (GA) was recorded using surface electromyography (EMG; 1000 Hz). Subjects were instrumented with a uniaxial electrogoniometer (1000 Hz) placed across the lateral side of the right knee to record flexion and extension for each walking condition. All walking conditions were performed on a standard treadmill (Quinton 18; Quinton Instruments, Seattle, WA). Subjects walked at a preferred speed for 10 minutes for each of the three conditions: normal shoe, Shape-Up shoe, normal shoe plus weight to equalize the weight of the Shape-Up shoe. EMG data were recorded during the beginning, middle and end of each 10-min walk. EMG data were full-wave rectified and filtered using a low-pass filter (300Hz). Average (AVG) and Root Mean Square (RMS) EMG were computed over 30s for each muscle (BF, RF, GA, TA). A 3(shoes) × 3 (time) repeated measures ANOVA was used for each muscle.
RESULTS: There were no interaction (p> 0.05) or shoe effects (p> 0.05) for any measures. Only RF AVG was different across time (p< 0.05).
CONCLUSION: Muscle activity was not influenced by walking in the soft shoes with a rocker bottom compared with normal shoes or weight-adjusted normal shoes.