As an athlete, you may get a lot of exercise from merely practicing your sport on a regular basis. This can contribute toward your physical activity needs if your workout regimen is well-rounded and targets sections of your body throughout. If this isn't the case, your training regimen may need to be tweaked, or you may need to integrate different routines outside of your training.
Remember that while daily activity is important, so is adequate rest. In truth, overexercising is a real condition that can lead to major complications such as coronary artery disease, cardiovascular irregularities, and arrhythmias. Because of the training required for peak performance, endurance athletes are particularly vulnerable to certain health issues, but other athletes are also at risk.
Certain foods are required by the human body in order for it to function properly. You can't expect to feel or look well if all you consume is junk food. And, as an athlete, you can't expect to perform well if you're not eating the correct things.