Popsugar Health & Fitness Trainer Tips 45-Minute HIIT Workout For Small Spaces Grab Your Dumbbells and a Towel, Because This 45-Minute HIIT Workout Heats Up Fast 27 February 2020 by Emilia Benton View On One Page Photo 6 of 9 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 6 Standing Side Crunches With Mini Band Loop a resistance band around both feet so you're standing on it. Stand up straight with both hands behind your head. Bring your right knee wide and up, at the same time dropping your right elbow so the two meet in a side crunch, as shown. Return to starting position, and repeat with only the right leg for 40 seconds. Alternate sides with each round. Previous Next Start Slideshow Trainer TipsHIIT Workouts45-minute WorkoutsIntermediate WorkoutsHIITWorkouts