It is no doubt technically possible to study metabolism and respiration of fishes during swimming at a constant rate, and of certain insects and birds during flight, and to obtain information similar to that obtained on man during work on a bicycle ergometer or a treadmill.

August Krogh

Bicycle Birds Certain Constant Doubt Fishes Flight Information Insects Man Metabolism No Doubt Obtain Obtained Possible Rate Similar Study Swimming Technically Treadmill Work

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