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Endorphins ("endogenous morphine") are endogenous opioid peptides that function as neurotransmitters. They are produced by the pituitary gland and the hypothalamus in vertebrates during exercise, excitement, pain, consumption of spicy food, love and orgasm, and they resemble the opiates in their abilities to produce analgesia and a feeling of well-being.
 endorphin neuroscience brain exercise orgasm running hypothalamus happiness endurance pregnancy achievement challenge satisfaction Wikipedia
The ungainly sight of a bird furiously flapping its wings as its spindly legs propel it forward could be a peek at evolutionary history. "Flap-running", researchers say, may have been a key step in the evolution of flight. Experiments with pigeons have shown that it helps birds ascend slopes and suggests the earliest flightless birds might have used the same technique.

2011-06-27

 running wing bird flying evolution
A Kenyan long-distance runner who spent more than two days lost in snow storms in the US state of Alaska has had his feet amputated just above the ankles.

2011-11-22

 Kenya frostbite Alaska cold feet running marathon
The city of Boston is staging its annual marathon. Kathrine Switzer became the first woman to officially run the race 45 years ago, despite stewards trying to physically force the 20-year-old off the road.

2012-04-16

 Boston marathon woman running incredible discrimination gender
Kenya produces some of the world's very best distance runners, but the possibility of winning Olympic gold is not the only incentive for the country's athletes.

2012-04-28

 Kenya running jogging motivation

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