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 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