Is stretching before and after exercise necessary to prevent injuries?

Posted 05/16/2012 | By HealthCorps

The myth is that it signals sleepiness, and another popular theory is that it is a way for the body to stimulate a deep inhaled breath to boost oxygenation. A recent study suggests that it may be a tool the body uses to “cool off the brain.” Participants in the study yawned twice as much on cooler days as they did on warmer days. The authors of the study concluded that the body may trigger a yawn reflex to regulate brain temperature on days when the air is cooler than the body.

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