The 28-Day HIIT Challenge – Day 28

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

The 28-Day HIIT Challenge – Day 25

Do each set three times. Rest for 20 seconds after each set. Total time: 45m Warm Up Workout

The 28-Day HIIT Challenge – Day 21

Do each set three times. Rest for 30 seconds after each set. Total Time: 45m Warm Up Workout

The 28-Day HIIT Challenge – Day 17

Perform each set three times before moving to the next. Rest for 30 seconds between sets. Sprint High Knees Jumping Jack The Mummy Squat Reverse Lunge Lateral Lunge Squat Hold Plank Cross Jack Push Up Tricep Dip Pike Side Bend Russian Twist

The 28-Day HIIT Challenge – Day 13

Rest for one minute after each round. Sprint Mountain Climber Cross Jack Crab Touch Side Suicides Tiger Push Up Skater Jump Russian Twist

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 8

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

The 28-Day HIIT Challenge – Day 7

Perform each set three times before moving to the next. Rest for 30 seconds between sets. Sprint Cross Jack Seal Jack Mountain Climber Squat Reverse Lunge Squat Hold Lateral Lunge Plank T-Stand The Mummy High Knees Push-Up Pike Bicycle Crunch

The 14-Day HIIT Challenge – Day 13

Perform each set three times before moving to the next. Rest for 30 seconds between sets. Sprint High Knees Jumping Jack The Mummy Squat Reverse Lunge Lateral Lunge Squat Hold Plank Cross Jack Push Up Tricep Dip Pike Side Bend Russian Twist

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