I'm getting Tired easy????!

I'm getting Tired easy????

When I play basketball or football I get tired real easily after a short while. I havent played for a month but it's happen before. Also my crest starts to hurt bad around the same time I get tired. But before this I could last 10X longer than now. Oh I'm 13 if that helps. Help!!! What can I do to cure it??

If you're feeling fatigued, it's important to establish the most basic of issues: Are you getting enough sleep? While everyone is able to function on less sleep than they prefer, if you are consistently under-sleeping, ongoing tiredness will be the result.
If on going tired-ness persists, you might have CFS - chronic fatigue syndrome. I have it. It's hard to deal with. It involves feeling exhausted, aches or pains, you could sleep for 12 hours and feel like you've only had 1 hour. It sucks, but with medical attention you're most likely able to figure out how to deal with it.
Make sure you're getting enough food and vitamins too. If you eat a lot of junk, the junk food gives you energy for a very short period of time. Healthy foods (like eating spaghetti at dinner) give you long lasting energy. Carbohydrates are the key. Make yourself a sandwich, with margarine, tuna in springwater, and lettuce. Have a bottle of gatorade ready for football or any other sports. If having a sports drink sounds risky, then have a bottle of water with a squeeze of lemon.
Good luck =]