14 Minute Fire HIIT Workout

For all levels, repeat the set four times. Rest for one minute after each set. Sprint Plank Jumping Jack Plank Rotation Squat Burpee Push-Up Seal Jack Plank Punch Squat Jump Alternating Leg Lift Burpee 1-2 Push Star In-and-Out Abs Squat Pedal

HIIT Workout – 4 Moves for Killer Abs

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

22 Minute Intermediate HIIT Workout

This workout will tone, tighten, and strengthen. Do each set three times. Rest for 30 seconds after each set. Jumping Jack Squat Jump Side Suicides Jump Lunge Sprint T-Stand Burpee V-Up 1-2 Push Sprinter Sit-Up Plank Punch