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exercise
- Imagine you're getting ready to race. The stress you feel makes your brain signal the adrenal glands to produce epinephrine or "adrenaline". Adrenaline ...
- ... tubes called ducts. You perspire constantly, even without exercise. Sweat is a liquid made from 99% water ...
- ... and vitamin D. In addition, maintaining a regular exercise program as approved by a qualified health care ...