Have you ever seen a pitcher throwing a baseball? This action, which involves maintaining stability on one foot while also moving both the free leg and the torso, activates the hip external rotators.

Background Previous research has shown that muscle imbalances may be an important risk factor for lower limb injuries in runners. No studies have evaluated hip musculature imbalance in sprinters.

Correspondence to Ruth Verrelst, Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185 3B3, Ghent 9000, Belgium; ...