Time to light up your hips, pelvis and legs with a series of quick and intense lower body strength drills. Begin by creating space in your hips, so you can move more freely through several challenging rounds of HIIT. You'll bring things to maximum intensity with jump squats into halasana, horse stance and knee highs. Expect to walk away out of breath, drenched in sweat, and basking in the glow of accomplishment.