The purpose of this study was to replicate and expand a previous study to identify the factors that affect students' learning of biomechanical concepts. Students were recruited from three universities (N = 149) located in the central and western regions of the United States. Data from 142 students completing the Biomechanics Concept Inventory (BCI) as pretest, posttest, and a 19-question behavior and characteristic survey over the course of a semester were collected to investigate the factors that assisted in learning. Students showed significant improvement (31%) in BCI scores from pre- to post-test (p less than 0.001), which was similar to previous studies. GPA, interest in the subject, and perceived application accounted for 9% of the variance in normalized student learning and 53% of the variance in final grade. The number of credits taken in physics was significantly related to final grade as well as several other categorical student behavior variables. The present study supports previous findings that student behaviors and characteristics influence learning biomechanical concepts. The new variables were also identified as factors that influence the learning of biomechanical concepts such as perceived application of the content to future careers, the major of the student, and the role students take on in a group setting. (Contains 1 figure and 2 tables.)