BACK-TOFRONT LUNGES

Stand with feet hip-width apart and your right foot on the towel. Slide your right leg back, bending your knees to lower into a back lunge, keeping your left knee over your ankle and coming onto the ball of your right foot. Without lifting your foot, slide your right leg to start, then forwards, lowering into a front lunge, right knee bent over ankle. Slide right leg back to start. That’s one rep. Do eight, then switch sides.

MAKE IT EASIER

Do just the back-lunge portion of the exercise.

MAKE IT HARDER

Add pulses: while in the lunge, raise and lower your body a few centimetres three to five times before sliding your foot back in.