Why Your Workout is Causing Weight Gain

You’re only moving during your workout.

“The most common mistake is that people will work out and then their other daily exercise goes down,” says Machowsky. When you put so much emphasis on your gym time, but you sit a desk the rest of the day—or maybe you pushed it so hard that you don’t have energy to move for the next 24 hours—you could essentially keep your daily calorie burn hovering at the same spot as before your workout routine picked up.