Date of Award


Document Type

Scholarly Project

Degree Name

Master of Physical Therapy (MPT)


Physical Therapy

First Advisor

Renee Mabey


Muscles -- physiology; Torque


The purpose of this study is to compare maximal quadriceps peak torque production in isokinetic strength assessment in the morning and the afternoon. Thn1y male subjects between the ages of21 and 43 volunteered for this study. The subjects were randomly assigned to either an early morning group (7:30 AM to 9 AM) or an afternoon group (2:30 PM to 5 PM). Each subject performed six maximal concentric isokinetic contractions with the quadriceps muscles after a warm up and an initial familiarization session. Data analysis was done using a t-test for paired samples and Pearson's correlation The results showed a .90 correlation coefficient and t(29) = -46, p<.05 showing that there was no significant difference between the AM and PM testing times. In conclusion, the use of the Kin-Com dynamometer in strength testing of peak torque in the quadriceps muscles is going to be accurate regardless of the time of day when comparing morning and afternoon strength testing.