5. High knees with boxing oblique twists

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Twisting through the trunk helps to slim the waist and work the core and obliques so you achieve beautiful curves through the midsection, while high knees make this move cardio – so you strengthen your abs while burning belly fat. Win, win!

» Hands in a guard position, snug under your chin, elbows pointing to your hips and your forearms facing the front. Run on the spot, lifting your knees up high to your belly button. 

» Now, add in upper-body twists side to side so your elbow meets the opposite knee.

Remember: knees high, hips forward and most importantly, pull the belly button into your spine to switch on your core. Now lift those knees soldier, high like your heart rate! 

NEXT: Looking for more high-intensity workouts? Try this gym free workout today.