Medicine & Science in Sports & Exercise:
Wednesday Afternoon Poster presentations Posters displayed from 1:00-6:00 pm. One-hour author presentation times are staggered from 2:00-3:00 pm., 3:00-4:00 pm., and 4:00-5:00 pm.: B-31 Free Communication/Poster - Strength Testing and Training: WEDNESDAY, MAY 31, 2006 2:00 PM - 5:00 PM: ROOM: Hall B
University of Tennessee at Chattanooga, Chattanooga, TN.
Supported by UC Foundation Grant, University of Tennessee at Chattanooga.
The ACSM currently uses normative data for muscular strength adapted from the Cooper Institute for Aerobics Research with upper body strength norm values being obtained from the bench press and lower body strength norm values obtained from the leg press. Currently, data concerning other major muscle group strength values does not exist.
PURPOSE: To provide normative data for one repetition maximum (1-RM) for 8 exercises in healthy young adult females.
METHODS: 126 females age 22.66 (+4.97) completed a health and physical activity questionnaire as well as a full fitness assessment including blood pressure, body composition, flexibility, neuromuscular balance, and maximal oxygen uptake. The following 1 -RM exercises were completed: bench press, leg press, lat pull down, leg extension, leg curl, shoulder press, triceps push down, and preacher curl. The bench press and preacher curl measurements were obtained using free weights. All other exercises used machine-weights. A familiarization session was completed prior to the testing session for each individual. Subjects completed a warm-up of 6 to 10 repetitions at 50–70% of subject's perceived capacity followed by a conservative 1-RM estimate. Subjects rested for 3–5 minutes between each lift. Full range of motion and consistent velocity was assured on each lift. Weight was progressively increased by 5 to 50 lbs. until a successful repetition could no longer be completed.
RESULTS: The mean for relative strength was as follows: Bench press 0.58 (±0.16), leg press 1.58 (±0.55), lat pull down 0.66 (±0.24), leg extension 0.88 (±0.24), leg curl 0.74 (±0.22), shoulder press 0.40 (±0.14), triceps push down 0.43 (±0.11), preacher curl 0.27 (±0.08).
CONCLUSION The data obtained gives information on previously unknown normative strength values for exercises in a sample of generally fit women. A comprehensive determination of 1-RM will help the clinician better develop a specific exercise prescription based on strengths and weaknesses of the individual. Progression goals could be set based on the known percentile ranking of the individual for each exercise. Correlation studies between 1-RM for each muscle group can also be explored.