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How High-Intensity Workouts Keep You Young

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But he was also in all probability getting larger than a hippie at a RatDog reunion. 

This ties in with my interview of John Ratey, MD, writer of Spark: The Revolutionary New Science of Exercise and the Brain. He was gushing concerning the feel-good effects of train of all kinds, but notably the tip-top high-intensity variety.

The teeth-gritting, vein-popping effort the “not enjoying” man was doing unleashes a veritable flood of happytime hormones and neurotransmitters, including dopamine, serotonin, nitric oxide, and endocannabinoids (that chemical sound familiar?). He was also pumping out copious amounts of human progress hormone—a naturally occurring hormone that will increase muscle mass and fat-burning, and because the identify implies, helps maintain our bodies young. 

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