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. April 24, 2024 Add as ...

If you're not familiar with gym machines, you may be more au fait with free weights, such as barbells, dumbbells and kettlebells. Praised for their versatility and do-anywhere-anytime quality, free ...