Mechanical efficiency of a champion walker

Oxygen consumptions were measured on a champion walker, while walking at between 6·4 and 16·9 km / hand while running at between 11.3 and 17.7 km/h. Above 9.7 km /h the curve of oxygen consumption against speed for walking was almost twice as steep as that for running, indicating that even champion walkers are more efficient, mechanically. when running than when walking abol'e 9·7 km/h. The curve for the champion walker was less steep than that for m'!n walking in the normal way above 9-7 km/ h indicating that the technique of 'rolling the pelvis gives competition walkers greater mechanical efficiency. It was also found that the VO2max of the champion walker was higher when running than I"hen walking

The influence of water restriction on the performance of men during a prolonged March

No Abstract

The danger of an inadequate water intake during marathon running

No Abstract

Physiological requirements for world-class performances in endurance running

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Physiological effects of the amphetamines during exercise

Oxygen consumption, heart rate, minute ventilation and blood lactate were measured on two champion cyclists at work rates from 45 to 362 W (2 000 - 16 000 ft-lb / min) on a bicycle ergometer after administration of a placebo and after 10 mg of methamphetamine, without their knowledge of which was given. No differences could be detected due to the ingestion of the amphetamine in submaximum or maximum oxygen consumption, heart rate, minute ventilation or blood lactic acid. However, after the amphetamine the men were able to continue to cycle at maximum effort for a longer period and in a run to exhaustion at 90 - 95% maximum effort one man increased the time 61 % and the other 29% with marked increases in blood lactic acid. Thus the study shows that amphetamines do not increase the men's capacity for aerobic exercise. It does, however, allow them to continue to exercise at high levels of effort for a longer period and endure a higher level of anaerobic metabolism. In short-distance events this may not be dangerous but in events lasting for more Than an hour the failure to be aware of 'danger signals' and to react to them could be a threat to life as was seen in the death from 'heat-stroke' of a British champion cyclist in a 'Tour de France' some years ago