Q: How many calories a day do I need to take in to gain mass and still not gain excess weight? I’m 16 and weigh 180 pounds. I train four or five days a week and have been gaining well over the past ...

Your fitness tracker may be flooding you with data, but when it comes to knowing your caloric output, you need to keep in mind very few things. And how you manage it will dictate your fitness levels ...

There's a right—and wrong—way to follow one.