You may have heard of the term ‘runner’s body’ in the fitness community. Depending on what camp you’re in when it comes to exercise, it will either have positive or negative connotations for you. If you’re a long distance runner, don’t let the gym bunnies convince you that a runner’s body is a bad thing! After all, running is one of the most physically demanding sports out there. It burns the most calories per hour compared to other endurance activities like cycling and swimming.