When you begin a workout or fitness program, ideally, you’ll want to be in an excitable state. However, if you’re in a state of burnout, starting any kind of physical activity could lead to problems, which are pretty common.
The challenge is maintaining a balanced state between working out and recovery based on the design of your exercise program. For example, if you work out at a given intensity, but your recovery time is too short, you won’t have the capacity to complete your next set within a prescribed window.
So, if you’re trying to do 8-12 reps, and you go too fast between exercises, you may not even get to 8. Technically, this may mean you’re draining your body more than training it.