I read a Frederic Delavier’s book « Strength Training Anatomy » and I learned good stuff.
Standing with your feet slightly apart. The barbell is on the floor in front of you :
Inhale, bend your torso forward with your back arched. If you can keep your legs straight or slightly bent.
Take the barbell with a pronated grip and straighten your body with your back rigid (your back is not more arched than the starting position). It’s at the hips level that the tilt occurs. Exhale at the end of the movement.
Returns to the starting position without the barbell touch the floor and do it again.
To avoid to have injuries, keep your back straight, it’s important.
This exercise works all the spinal erectors, it’s the muscles that run along each side of your spine. These are the muscles that allow you to straighten your spine.
When you straighten your torso, during the tilt forward of your hips, this exercise works the gluteus maximus and hamstrings (except the thigh biceps short head).
This exercise stretches the back of your thighs when you return to the starting position.
It’s possible to raise your feet compared to to the barbell (with a plate weight or a step) so that the exercise is more effective.
This exercise can be used as a stretching movement for hamstring with light weights.
The heavier the weight and the greater the gluteus will work compared to the hamstrings to straighten your hips.
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