Can Turnout Measurements Be Used to Predict Physiotherapist-Reported Injury Rates in Dancers?

Abstract

Research has suggested that dancers may be more at risk of injury when they excessively utilise non-hip components of turnout to compensate for deficits in hip external rotation when trying to achieve maximal total turnout. However, recently different measures of turnout have been cited in the literature as well as suggestions for derived variables to account for shortfalls in particular components of turnout. This study aimed to assess whether measurements of turnout can predict the number of injuries (0 or 1 injury, or 2+ injuries) over a 10-month period. At the beginning of the academic year, 47 female, full-time, contemporary dance students (mean age 19.9 ± 2.51 yrs; height 1.65 ± 0.05 cm; weight 56.23 ± 6.51 kg) were screened as part of a biannual screening process. Measurements, summed of both legs, were obtained for passive hip external rotation (pER), total passive turnout (TPT), and total active turnout (TAT). From these, three further variables were derived: compensated turnout, muscular turnout, and active ER lag. At the end of 10 months, the dancers' physiotherapist-reported and self-reported injuries were obtained. Binary regression analyses for the six turnout variables identified compensated and muscular values as having significant positive effects. For every 1% increase in compensated and muscular values, there was a corresponding 9% or 8.4% increase in the odds that the dancer would sustain 2 or more injuries compared to 0 or 1 injury. Screening compensated and muscular values may be useful to address shortfalls to prevent injuries in the future.