Supine lying short lever hip extension strengthening BR (level 1) (Hip extension, buoyancy resisted, leg bent (level 1), supine)

Lie on your back in the water with a noodle under your hips and the poolside behind your head.
Hold onto the poolside with your hands above your head.
Place a large inflatable ring under the heel of your resting leg.
Bend your exercising knee and push your heel down towards the floor whilst tensing your buttock muscle.
Allow your leg to return to the pool surface.