Performing the: A Step-by-Step Tutorial 45 degree hyperextension
Keep your body straight and bend at your waist while keeping your back flat, continue to lower your torso until you feel a mild stretch on the hamstrings.
Begin to raise your torso by extending through the hips with your back still kept straight, continue this movement until your body is in line with your legs.
Hold this position for a few seconds, focusing on squeezing your glutes and hamstrings at the top of the movement.
Slowly lower your body back to the starting position, repeating the movement for the desired amount of repetitions.