5. Mountain Climbers
From a straight-arm plank position with hands directly under shoulders, legs straight and resting on the balls of your feet, bring right knee to right shoulder. Switch between right and left knees back and forth as quickly as you can without losing proper form. Repeat for one minute. Tip: The faster you go the bigger the HR boost, but never sacrifice form for speed.
Works: Shoulders, chest, abs, hip flexors, and quads + increases HR
You can complete this boot camp barre interval workout up to three times through. These quick, effective, super-charged moves will leave you shaking because you shook things up in your fitness routine. Prepare to see news changes in your body, too.