Date of Award


Degree Name

Master of Arts


Human Performance and Health Education

First Advisor

Dr. Mary L. Dawson

Second Advisor

Dr. Roger Zabik

Third Advisor

Dr. Robert Moss

Access Setting

Masters Thesis-Open Access


This study described biomechanical deviations from proper biceps curl technique specifically in the shoulder, trunk, body and knee angles, that occurred in response to varying intensities of an individual's 1 RM (repetition maximum). Ten college age males participated in the study. Subjects were required to perform one repetition at 60%, 70%, 80%, 90% and 100% of his 1 RM. The only differentiating factor was the order in which the five intensities were performed. Condition order was randomized to minimize bias. Movement was filmed with a high-speed motion picture camera, digitized and then analyzed with computer software.

The findings indicated that a relationship existed between resistance and the magnitude of movement in the selected angles. As resistance increased, angular movement correspondingly increased.

It was concluded that training at intensities less than 90% of an individual's 1 RM was more conducive to proper technique and would still allow for optimal strength gains.