The 28-Day HIIT Challenge – Day 14

High Knees Grasshopper Burpee Spiderman Star Ball Press Jump Lunge Reach Side Suicides Squat Pedal Ski Jump Sphinx Power Knee Squat Jump 1-2 Push

The 28-Day HIIT Challenge – Day 11

Put your cardio endurance to the test with this routine that goes from high-energy cardio to explosive strength exercises. Remember: Train insane or remain the same! No rest between rounds. Sprint Squat Seal Jack Reverse Lunge Push Up Jump Lunge Cross Jack Squat Jump

The 28-Day HIIT Challenge – Day 6

Each set in this workout is engineered to work as many muscle groups as possible, super-charging your metabolism. Remember form is especially important – quality trumps quantity! Sprint Cross-Country Seal X-Jack Mountain Climber Squat Reverse lunge Squat Jump Jump Lunge Power Knee Burpee Tiger Push-Up

The 14-Day HIIT Challenge – Day 14

High Knees Grasshopper Burpee Spiderman Star Ball Press Jump Lunge Reach Side Suicides Squat Pedal Ski Jump Sphinx Power Knee Squat Jump 1-2 Push

The 14-Day HIIT Challenge – Day 10

Yelling, “I’m a star!” as loudly as possible is optional during this routine, but highly recommended! That brief moment of levity may make you forget how much your legs and legs are burning during this blockbuster workout. X-Jack Jump Lunge Star Cross Push

The 14-Day HIIT Challenge – Day 3

Push-Up Squat Jumping Jack Plank Hold Cross Push Jump Lunge Tricep Dip Burpee 1-2 Push Squat Pedal Crab Touch Alternating Leg lift Burpee

The 7-Day HIIT Challenge – Day 7

Sprint Cross-Country Seal Power Knee Mountain Climber X-Jack The Mummy Reach Burpee Squat High Knee Jump Lunge