Add Yahoo as a preferred source to see more of our stories on Google. When time is limited, and you can only spare 45 minutes to an hour for a daily workout, every second counts. The long, sometimes ...

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. Curls are the classic ...

STRENGTH TRAINING CAN become monotonous, especially once you've been lifting for a long time. Rep after rep of the same few exercises can get boring—and when it does, sometimes exercisers can get a ...