Fifty women were randomly assigned to 5 groups (n = 10 each): The Microwave Diathermy Group had the hamstrings heated by microwave before stretching; Treadmill Group, in which warm-up walking was performed before stretching; 30-Second Group, in which 30 s of stretching was performed; 10-Minute Group, which involved stretching for 10 min and Control Group. 
THERM