Popsugar Fitness Workouts Indoor Cardio Exercises When It's Raining or Too Hot to Run Outside, I Do These 23 Indoor Cardio Exercises June 25, 2020 by Jenny Sugar View On One Page Photo 7 of 23 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 Jump Rope Grab a regular or heavyweight jump rope and do 300 jumps (called single-unders). Previous Next Start Slideshow WorkoutsCardioFull-Body Exercises