Core activated hip flexor stretching in half kneeling

​Purpose:
Improve hip extension range in weight bearing.

Description:
In half kneeling, place both hands on the front knee. 
Press down on the front knee, with elbows locked. 
Lunge into hip extension on the weight bearing leg.

Implications:
Pressing down on the front leg generates anterior torso activation, approximates the ribs to pelvis, thus stabilizing the lumbar spine.
An unmanaged hip extension limitation has implications for all lower quarter patterns, since reduced joint mobility can affect extension, rotation and flexion.