Yes! If you have a shoulder injury, lower-back pain or a weak core, you should not attempt this move. Okay, so now the chitchat's over, let's get down to business. [We earn a … See more

This puts pressure on your back, when it’s your core that should be doing the hard work. Use your abs to keep your hips up and back straight, if in doubt, find a mirror and check … See more

Don’t allow the ball to slip forward on to your shins. Keep your legs in one long line to ensure the tips of your toes are the point of contact with the ball. See more

Do 10 pikes, then 10 lunges, resting your back leg on the ball. Do 3 sets. Sign up to our newsletterto get more articles like this delivered straight to your inbox. SIGN UP See more