Every now and then, fitness TikTok digs up something that’s been around forever and calls it a “trend.” Earlier this year, the honors went to zone 2 cardio, a relatively low-effort form of fat-burning ...

While there’s no hard and fast rule, experts state one is (usually) better than the other. If you want to build a healthy, strong, and functional body, your best bet is to create a well-rounded ...