Research article THE INFLUENCE OF BODY POSITION ON LOAD RANGE….pdfVIP

©Journal of Sports Science and Medicine (2006) 5, 400-406 Research article THE INFLUENCE OF BODY POSITION ON LOAD RANGE DURING ISOKINETIC KNEE EXTENSION/FLEXION Brian W. Findley 1, Lee E. Brown 2 , Michael Whitehurst 3, Tedd Keating 4, Daniel P. 2 2 Murray and Lisa M. Gardner 1 Palm Beach Community College, Boca Raton, FL, USA 2 California State University, Fullerton, Fullerton, CA, USA 3 Florida Atlantic University, Davie, FL, USA 4 Manhattan College, Bronx, NY, USA Received: 06 March 2006 / Accepted: 09 July 2006 / Published (online): 01 September 2006 ABSTRACT Isokinetic range of motion (ROM) has three distinct phases: rate of velocity development (RVD), load range (LR), and deceleration (DCC). The purpose of this study was to determine if differences in isokinetic knee extension/flexion LR exist between body positions. Ten subjects (4 males and 6 females, age 29.3 ± 5.4 yrs, ht 1.71 ± 0.10 m, wt 71.9 ± 12.9 kg) volunteered to participate in the seated vs. prone investigation and nine different subjects (4 males and 5 females, age 29.5 ± 6.9 yrs, ht 1.72 ± 0.09 m, wt 69.0 ± 13.8 kg) volunteered to participate in the seated vs. supine study. Each subject completed 3 maximal reciprocal concentric/concentric repetitions of dominant knee extension/flexion on a Biodex System 2 isokinetic dynamometer at 60, 120, 180, 240 and 360 deg·sec-1 in the supine or prone and seated positions. Repeated measures ANOVA revealed that only seated flexion at 360 deg·sec-1 (57.6 ± 1.7 degrees) elicited significantly (p 0.05) greater LR than prone (49.2 ± 2.8 degrees). No significant differences in LR extension or flexion existed at any velocity between the supine vs. seated positions. ANOVA als