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. If you want to start ...

Weight loss happens in a calorie deficit, where a person burns more calories than they consume. Calorie counting is not an exact science, but can be a useful educational tool. Avoid common mistakes ...

If you've been following a low-calorie diet and splurged one day, you may be surprised to find that you didn't gain any weight. Some dieters do this on purpose. This is often called calorie cycling or ...

If your New Year's resolution is to get fit, you have a good tool strapped to your wrist. Here's how to put Apple Health's calorie burn metrics to good use. When commencing a fitness program that ...

When you invest in a smartwatch like the Apple Watch Series 10, a side benefit is you're getting a device that can help you achieve your fitness goals. The Apple Watch is known for its health features ...

I am looking into the subject for this week's column for a friend. It's not that I have any personal need for the information, you understand. My friend wants to know how to determine how many ...