Prediction of 10 repetition maximum for short-arc quadriceps exercise from hand-held dynamometer and anthropometric measurements.
Short-arc quadriceps exercise are commonly prescribed in physical therapy for strengthening knee extensor musculature. Determining the appropriate starting resistance has traditionally been a trial-and-error procedure. Therefore, developing an expedient method of estimating the correct starting resistance may lead to a more accurate exercise prescription. The primary purpose of this study was to establish a technique for predicting an individual's 10 repetition maximum (10 RM) based on hand-held dynamometer (HHD) strength recording and additional anthropometric predictor variables. Fifty healthy subjects (31 males and 19 females), aged 22-53 years, participated in the study. A prediction equation for determining 10 RM using HHD strength recording, weight, gender, and age was developed. By implementing this equation, clinicians can predict a normal, healthy, young to middle-aged adult's 10 RM within +/- 4.17 kg with a 95% confidence level (SEE = 2.13 kg).
Walsworth
M
M
U.S. Army-Baylor University Graduate Program in Physical Therapy, Academy of Health Sciences, Fort Sam Houston, TX, USA.
Schneider
R
R
Schultz
J
J
Dahl
C
C
Allison
S
S
Underwood
F
F
Freund
J
J
D000328:Adult; D000886:Anthropometry; D001696:Biomechanical Phenomena; D015444:Exercise / Q000502:physiology*; D017079:Exercise Tolerance / Q000502:physiology*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D011237:Predictive Value of Tests; D016059:Range of Motion, Articular / Q000502:physiology; D012016:Reference Values; D012044:Regression Analysis; D015203:Reproducibility of Results; D013314:Stress, Mechanical