the adverse effect of static stretching on H:Q ratios was discussed

In a previous summary, the adverse effect of static stretching on H:Q ratios was discussed. Despite the ongoing debate, static stretching remains the most widely used method of preparing for exercise. This study investigated the acute effects of static hamstring stretching on biomechanical characteristics of the running gait cycle. 

34 recreational athletes were recruited and allocated to either the intervention or the control group. In both groups, hamstrings flexibility was assessed and then running kinematic data at the preferred treadmill running speed (2.9±0.5 m*s-1) were collected using reflective markers and a motion-analysis system. The control group rested in between measurements, while the intervention group received assisted 3 static hamstring stretches; subsequently, hamstrings flexibility and running kinematics were determined again at the preferred treadmill running speed (3.1±0.5 m*s-1). 

The results show that three static hamstring stretches do not affect pelvis, hip or knee kinematics in the running gait cycle. Both groups showed a similar increase in hamstring length, probably resulting from the first running interval. > From: Davis Hammonds et al., J Athl Train 47 (2012) 5-14. All rights reserved to the National Athletic Trainers’ Association, Inc.