The ideal number of days a week to work out depends on your fitness goals. Working out at least three days a week is sufficient for most people. It's important to incorporate both cardiovascular and ...

Understanding the ideal frequency for working the same muscle group is crucial for making progress, avoiding injuries, and most importantly, allowing your body to recover and strengthen properly.

In TODAY.com's Expert Tip of the Day, a trainer explains how incorporating HIIT into a weekly workout routine can boost one's metabolism and help with weight loss.