Set up in a high plank and reach one hand out in front. This will send your core into overdrive, with 20 per cent more abs activation than a crunch. Crunch: Endless reps will put pressure on your ...

followed by 10-second rest Side plank reach through right side 40 seconds, followed by 10-second rest Side plank reach through left side 40 seconds, followed by 10-second rest Break dancer 40 ...

Start in an elbow plank with your palms facing up. With your abs pulled toward your spine, reach your right arm forward keeping your torso as still as possible. Bring your elbow back to the mat.