Major Muscles and Actions Involved
In this exercise the gluteus maximus, hamstrings, and upper hamstring tendons, are involved in hip joint extension, while the erector spinae is isometrically involved in holding the spine in lordosis, that is, with a slight arch in the lower spine. In the bent-leg variant the quadriceps femoris muscle group is also involved in knee joint extension.
Muscles in Action
Because the muscles and actions are identical to the good morning and the other hip extension exercises, the sports uses are the same as for these exercises.
Important Facts to Know