Effects of Partner's Improvisational Resistance Training on dancers' muscular strength.

The purpose of this study was to observe the effects of Partner's Improvisational Resistance Training (PIRT) on muscular strength, body circumference, and body fat percentage in 10 female college-age dancers in comparison with 8 female dancers in a control group. The PIRT program, based on the concepts of manual resistance training, is the application of contact improvisation in a systematic strength development program, which proposes a way of contextualizing muscular strength development within the dance class. The program lasted 8 weeks, meeting 3 times weekly for 60-minute sessions. The muscular strength pre- and posttests included 1-repetition maximum (1RM) for leg extension, leg flexion, leg press, bench press, lat pulldown, back extension, and modified sit-up. Hydrostatic weighing for body composition and circumference measures on the waist, hip, shoulder, upper arm, and thigh were made pre- and posttest analyses. There were no significant pretest differences between the groups for age, height, body weight, body fat percentage, any of the circumference measures, or 5 of the 7 muscular strength measures. At posttest, neither group showed significant changes in total body weight, body fat percentage, or lean body weight. The experimental group showed significant decrements in the waist and hip circumference measures, and all other body circumference changes were nonsignificant. The experimental group showed significant changes from pretest to posttest for all seven 1RM strength measures and greater absolute and relative strength improvements in 5 measures compared with the control group. Thus, the 8-week PIRT program for female dancers was found effective in improving overall muscular strength and decreasing circumference in the waist-hip region, but it did not elicit significant changes in body composition.