[imark3000]

http://neurotalk.psychcentral.com/ne...newthread&f=34

One theory for some of the benefits of exercise include the fact that exercise triggers the production of endorphins. These natural opiates are chemically similar to morphine. They may be produced as natural pain relievers in response to the shock that the body receives during exercise. However, researchers are beginning to question whether endorphins improve mood. Studies are showing that the body's metabolism of endorphins is complex, and there are likely additional mechanisms involved in the mental health effects of exercise.

Some studies have found that exercise boosts activity in the brain's frontal lobes and the hippocampus. We don't really know how or why this occurs. Animal studies have found that exercise increases levels of serotonin, dopamine and norepinephrine. These neurotransmitters have been associated with elevated mood, and it is thought that antidepressant medications also work by boosting these chemicals.

Exercise has also been found to increase levels of "brain-derived neurotrophic factor" (BDNF). This substance is thought to improve mood, and it may play a role in the beneficial effects of exercise. BDNF's primary role seems to be to help brain cells survive longer, so this may also explain some of the beneficial effects of exercise on dementia.

[imark3000]

http://www.rice.edu/~jenky/sports/antiox.html
Exercise stimulates natural body antioxidants. But what about anioxidant supplements? Is too much antioxidant supplements harmful? what is too much?
All these questions have no answers while the supplements industry continue to thrive !
Imad