Lie on floor or mat. Place one leg straight and bend the other leg with foot flat on floor or mat. Place arms down on mat to each side of hips.
Raise body by extending hip of bent leg, keeping extended leg and hip straight. Return to original position by lowering body with extended leg and hip straight. Repeat and continue with opposite sides.
Hamstring remains in active insufficiency throughout movement since knee is significantly flexed and hip does not flex beyond 90 degrees. Adductor Magnus does not assist since hip extension does not occur in fully flexed position.