The 14-Day HIIT Challenge – Day 5

Rest for two minutes after each round. Sprint Cross Jack The Mummy Mogul Jump Squat Pedal Spiderman Ball Press V-Up

The 7-Day HIIT Challenge – Day 5

Unlike doing endless crunches that focus only on the six-pack abs (rectus abdominis), these exercises together create a set that will attack your entire core. Let me know how the core killer set works out for you! V-Up Double Cross Reach Sprinter Sit Up Plank Punch