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 16

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 28-Day HIIT Challenge – Day 15

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

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 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 4

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

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