I was recommended that exercise before it didnt help me. Naudi Aguilar from functional patterns talks about that exercise as not being the best choice because it teaches you how to do hip extension and knee flexion at the same time (which are never done in the same time in real life). So it is teaching you the incorrect neural associations and patters. When doing knee flexions you should do hip flexion.

A variation I have been doing of that exercise is instead of flexing the knees I do straight leg hip extension. It still hasn’t been much felp