Daodun largely works out at home, with the addition of an in-person yoga class most weeks, which is an hour long. Other than ...

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.

Everyone's been there: You're standing in the gym, staring down the same old workout routine you've done 1,000 times, already spacing out as you start your first circuit or mile on the tread. You know ...