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. So where should you ...

10. High-Intensity Interval Training (HIIT) HIIT has been said to be one of the most time-efficient workouts around. Check out the best HIIT workouts for beginners. Now, if you're looking for specific ...

From machines to at-home HIIT, these workouts maximize calorie burn to help you lose weight and keep it off. Efficient, high-intensity, varied cardio burns more fat than steady-state, low-intensity ...

Calisthenics and cardio exercises can be arranged in several ways to improve running times and overall fitness test scores. Few, though, push you as hard as this one in a progressive manner -- until ...

Every step you take during traditional cardio exercises could be slowly destroying your knees, hips, and ankles. The repetitive forward motion that defines most cardiovascular workouts creates a ...

You can skip the long gym sessions this summer - a PT has just revealed how to do a full-body 20-minute kettlebell workout at home ...

Being strong isn't just a mental state; it is also a physical feat. The higher the amount of strength you have, the healthier you are in terms of your composition and function. While eating right is ...

Running is the workout most synonymous with cardio, however, there are so many ways to get in a solid aerobic workout (and even have it combined with strength training). In terms of the best cardio ...