Ever workout so hard you get a headache? These headaches caused by strenuous exercise are called exertional headaches and are thought to be harmless. Nobody knows exactly why or what causes these headaches to occur, but the theory is when the body undergoes intense physical exercise, the bodies blood vessels dilate in order to increase the blood flow to the heart. As the vessels expand they put pressure on pain receptors in the head, causing this brutal pain that sometimes lasts a whole day.

Eight ways to avoid headaches:

1. Say hydrated.

2. Limit caffeine.

3. (Especially for exertional headaches) Warm up thoroughly before working out. This will help your body get use to the shift in bloodflow.

4. Limit alcohol.

5. Eat a healthy and balanced diet.

6. Take multivitamins.

7. Limit sodium.

8. Sleep!