Prediction equation of hip external rotators maximum torque in healthy adults and older adults using the measure of hip extensors maximum torque.

Background: The use of predictive equation of muscular torque can reduce physical effort and time spent during evaluation.

Objectives: To establish, validate, and test the accuracy of a prediction equation to estimate the hip external rotators (HER) torque in adults and older adults by means of hip extensors (HEX) torque measurement.

Methods: Eighty-three healthy adults (development set) were assessed to test the association of HEX and HER torques and to establish the prediction equation.