Master these to improve core strength, balance and posture, says the founder of London’s Body Machine fitness studio
Adjust TRX straps to hang with handles at knee height, foot cradles at mid-calf. Get on all fours, placing both feet in straps, keeping hands and knees on the floor. Lift body to plank position, arms and legs straight. Keep body aligned – shoulders down and back, lower back not dipped, hips not raised. Flex your feet to engage glutes. Hold for 10-40 sec. Repeat twice.