Stabalise your stride
Sprinters, triathletes and shoplifters know the merits of hardworking hamstrings. “They are fundamental to running with the correct stride length,” says elite level running, duathlon and triathlon coach Ralph Hydes.
How: Hamstring Curls
Lying on the floor, place both heels on a stability ball. Keep your shoulders on the floor and lift your body. Draw your legs towards your backside, rolling the ball towards you. Do three sets of 15 reps.