Master of Science (MS)
First Committee Member
Number of Pages
The purpose of this study was to investigate the possible mechanism responsible for the decrease in force during the 5Ã‚Â°/sec velocity compared to the isometric velocity. Subjects (n = 9) completed MVC knee extension exercises during eccentric speeds of 5, 10, and 15Ã‚Â°/sec, as well as isometric contractions. Extensor force and average EMG (aEMG) of the vastus lateralis (VL) and biceps femoris (BF) were quantified at knee angles of 55Ã‚Â° and 65Ã‚Â°. Six ANOVA (alpha = 0.05) tests determined a decrease in FT (p < 0.05) at both knee angles and a decrease in VL aEMG (p < 0.05) at 55Ã‚Â° during 5Ã‚Â°/sec condition compared to the isometric condition. No change in BF aEMG was observed across speeds (p > 0.05). It was concluded that there is a controlling mechanism which is neurological in nature which reduces F T during slow eccentric conditions.
Isokinetic; Muscle; Performance; Slow; Speeds
Physical therapy; Physiology
University of Nevada, Las Vegas
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Kwantes, Jonathan Michael, "Muscle performance during slow isokinetic speeds" (2001). UNLV Retrospective Theses & Dissertations. 1252.