17 Quiet, At-Home Cardio Exercises That Trainers Recommend
Break a Sweat With 17 Quiet, Bodyweight Cardio Moves That Won't Annoy Your Neighbours
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"Using the largest muscle group in the body, the speed squat is an awesome way to light our legs on fire and increase the heart rate," Hardy said. The cues are the same as for a traditional air squat, but you'll move at the fastest tempo you can while maintaining proper form.