Medicine: Capsules, Aug. 20, 1973

> Athletes often credit an outstanding performance to a "second wind" — a sudden burst of energy that seems to occur after fatigue has set in. But two University of Utah researchers have apparently shown that there is really no second wind. Nyles Humphrey and Robert Ruhling, of the University's department of physical education, asked 26 men between the ages of 18 and 25 to run on an inclined treadmill at a constant speed of 7.5 m.p.h. until their heart rates reached 180 beats per minute or they became fatigued. Fourteen of the stationary runners said that they experienced...

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