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

The 7-Day HIIT Challenge – Day 2

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 3-Day HIIT Challenge – Day 3

Rest for one minute after each round. Squat Sprint Jump Lunge Tiger Push-Up Seal Jump Burpee X-Jack

Power Hour HIIT Workout #3

Do each set three times. Rest for 30 seconds after each set. Total time: 45m Warm Up Work Out

30 Minute HIIT Workout – When in Doubt Workout

Perform each set three times before doing the next. Rest for 30 seconds between sets. Sprint X-Jack Seal Jack Mountain Climber Squat Reverse Lunge Squat Jump Jump Lunge Plank Punch Speed Skater Mogul Jump Star High Knees 1-2 Push Pike Double Cross

4 Minute Metabolic Booster HIIT Routines

Sprint Squat Push Up In-and-Out Abs X-Jack Cross-Country Seal Crab Touch Star Sprint Spiderman Up Down 1-2 Push Power Knee Squat Jump Burpee Burpee Jump Lunge Cross Push Cross Jack Squat Pedal Tiger Push Mogul Jump V-Up

Firm and Burn HIIT Workout

Jumping Jack Cross-Country Seal X-Jack Mountain Climber Mountain Climber The Mummy Push-Up Seal Jack Squat Squat Hold Sprint 1-2 Push Crab Touch Squat Jump Pedal Squat Lift Ski Squat Cross Push 4 Calf Raises + 4 Taps Reach Up Down

Metabolic-Boosting HIIT Workout

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