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. High intensity ...

Walking, swimming and HIIT can all improve cardiovascular fitness, but which one is best for you? A cardiologist explains the ...

High-intensity interval training is a workout technique that gets you a lot of bang for your buck. This type of workout serves as cardio and strength training, burning calories, boosting your ...

Working out until you puke isn't actually making you leaner.

This 30-minute HIIT workout is strength and cardio all in one. Join PS Fit trainer Ashley Joi to break a sweat and get your heart rate up.

A study in the Journal of Exercise Science & Fitness looked at weights and cardio training and determined that guys doing HIIT first expended more energy. A new study indicates that doing hot yoga ...

Coach-backed HIIT tips and a starter workout to sharpen fitness before the season ends.

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Dear Rachel, After years of doing cardio and HIIT classes, I'm trying to incorporate more strength ...