Ten female collegiate dancers (age = 20.2 ± 1.32 yr; ht = 65.15 ± 1.49 in; wt. = 121.7 ± 9.99 lbs) all members of the 2007-2008 University of St. Thomas Dance Team volunteered to participate in this study. The participants filled out a questionnaire to document injuries sustained. Severity of pain was rated on a scale. Right and left quadriceps and hamstring strength were tested with the Lafayette Manual Muscle Tester (Model 01163). Medial and lateral rotator, abductor, and adductor strength was also measured using the Lafayette Manual Muscle Tester. Each site was tested three times with fifteen seconds of rest between measurements. The average value of measurements was used for analysis.
Data was analyzed using a paired t-test. Strong correlations were found between the right and left hamstring muscles (0.52), right and left abductor (0.86) and right and left adductor (0.89) muscle groups.
Significant strength differences between the right and left sides of collegiate dancers were found in the right and left quadriceps (0.02), right and left medial rotators (0.05), and lateral rotators (0.03). These results may indicate that certain repetitive movements that dancers perform cause muscular imbalance.