serotonin is a neurotransmitter in the brain that scientists have found to be related to fibromyalgia. neurotransmitters are brain chemicals that send specific messages from one brain cell to another. while only a small percentage of all serotonin -- 1% to 2% -- is located in the brain this neurotransmitter is believed to play a vital role in mediating moods. studies have found that too much stress can lead to permanently low levels of serotonin. that in turn can create aggression. an increased level of serotonin in the brain is associated with a calming anxiety-reducing effect. in some cases it's also associated with drowsiness. a stable serotonin level in the brain is associated with a positive mood state or feeling good over a period of time. lack of exercise and inactivity can aggravate low serotonin levels.
does exercise boost serotonin in people with fibromyalgia?