Originally Posted by Brandon Oto
If glute-ham raises are so good for improving hip extension, why aren't we all doing leg extensions to develop beastly hip flexion and powerful quads?
Nobody does GHR as a primary exercise for hip extension. They use it as an assistance exercise to help work weaknesses and improve their squat/DL/PC/whatever and the GHR has a decent carry over to those moves so it makes sense. If leg extensions had more functional carry over of strength to hip flexion they may be employed more frequently, but they don't so they aren't