Date of Award

Spring 2018

Document Type

Thesis Restricted

Degree Name

Master of Science (MS)



Committee Chairperson

Kenneth P. Clark, Ph.D.

Committee Member

Jason Cholewa, Ph.D.

Committee Member

Rick Howard, Ph.D.


This investigation analyzed the differences in power generated by college aged males when an exercise was performed isotonically and isokinetically. The purpose was to evaluate the relationship between variable and constant velocity during a strength and power exercise. Subjects performed deadlifts with both a traditional Olympic barbell and with a custom DMX-Strength isokinetic machine, a cable strength training apparatus that allows for movements to be performed at constant user determined velocities. Subjects completed deadlifts at matched averaged velocities using both Olympic barbell and DMX-Strength machine, while standing on a force plate. Force data was calculated and power was calculated. Independent t-tests revealed no significant differences in power and force production across the range of movement velocities. Neither mode appears more advantageous for force and power production, but isokinetic training may provide an alternative and more user-friendly mode of exercise while delivering similar strength and power benefits.