Clinical and functional outcome assessment
tenderness, pain
At the single follow-up study visit, all patients completed the Perth Hamstring Assessment Tool (PHAT) [A physical examination of both limbs of the patients was performed by a senior orthopaedic resident. Patients were asked to lie in prone position on a flat examination table. To assess local tenderness, the ischial tuberosity was palpated, and patients were asked whether they felt pain (yes/no) [Maximum isokinetic muscle strength of the knee flexors and extensors was measured for both limbs using an isokinetic dynamometer (Biodex Medical Systems 4 Pro, Mirion Technologies, GA, USA) by a trained movement scientist. The reliability, validity and accuracy of this system has been previously reported [