BARGAIN BUYS FOR A BOOST

Two this week. If you’re new to core training, then sitting on a gym ball to watch TV is brilliant – the instability fires up all the ab muscles to keep you balanced. Try OXFIT Exercise Ball (£10.95, Amazon). Likewise, if you have a certain level of ab strength, then an ab wheel is perfect – you use your abs to wheel out and then slowly slide back. Mitavo Ab Roller (£7.99, Amazon).