The 28-Day HIIT Challenge – Day 23

Sprint Squat Cross-Country Seal Mountain Climber X-Jack Push-Up Jack Jump Lunge Grasshopper Tiger Push-Up Burpee

The 28-Day HIIT Challenge – Day 19

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

The 28-Day HIIT Challenge – Day 18

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 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 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