Exercise helps to reduce stress it seems

Discussion in 'Health & Fitness' started by dave333, Nov 18, 2009.

  1. dave333

    dave333 Hall of Fame

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    http://well.blogs.nytimes.com/2009/11/18/phys-ed-why-exercise-makes-you-less-anxious/?em

    Cool stuff. More reason to exercise!
     
    #1
  2. ollinger

    ollinger Legend

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    This particular study has been examined in the scientific literature and is not all that well regarded. A large problem is that the "control" group was PREVENTED from moving about. This is a stressor that is certainly not comparable to a human's CHOICE not to exercise, and the restraint of the rats creates a stress that in itself may limit the plasicity and responsivity of the rats' central nervous system. So the control group is not really a control group at all but rather a group that was exposed to a stressor the other rats were not. Note also that the study refers to brains cells "created" during the experimental period. There is no clearly comparable phenomenon in humans, since you are born with all of your brain cells, though synaptic connections and dendrite pruning may occur. Properly done controlled studies in humans don't particularly support the notion that exercise somehow reduces vulnerability to stress. Most studies are either retrospective or lack proper control groups. The most recent studies concerning depression find no measurable benefit from exercise.
     
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