Get stronger without straining your knees, hips, or shoulders.

Stand tall and then step back with one foot, with your heel lifted. Keeping most of the weight on your front foot, bend both ...

Try it as a standalone core workout, or at the end of a lift as a finisher.

Try this low-impact, equipment-free workout ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Heart rate zones are a ...