Athletes

<\/div><\/div>”],”filter”:{“nextExceptions”:”img, blockquote, div”,”nextContainsExceptions”:”img, blockquote, a.btn, a.o-button”},”renderIntial”:true,”wordCount”:350}”> Back in 1969, naval researchers took blood samples from …

<\/div><\/div>”],”filter”:{“nextExceptions”:”img, blockquote, div”,”nextContainsExceptions”:”img, blockquote, a.btn, a.o-button”},”renderIntial”:true,”wordCount”:350}”> You’d have a hard time finding any serious endurance …