90/90 Hamstring

How to do it

1Lie on your back, with one leg extended straight out.

2With the other leg, bend the hip and knee to 90 degrees. You may brace your leg with your hands if necessary. This will be your starting position.

3Extend your leg straight into the air, pausing briefly at the top. Return the leg to the starting position.

4Repeat for 10-20 repetitions, and then switch to the other leg.