4. Mountain Climbers
A great way to build on the core and obliques, this full-body move can help bring your heart rate up in no time at all. You don’t need any equipment, and you can control the speed. For more of a sweaty cardio workout, increase the speed. For lower impact, decrease the speed. Of course, this move is kind of like burpees and many people have a love/hate relationship with them. Picking the pace that’s right for you is important, and you can always take breaks or make modifications.
