Five chimpanzees (two immature of each sex and one adult male) were trained for testing of elbow flexion strength. Resulting scores were compared with those of seven young (20 to 37 years) adult human males. The apes manifested a 2-1/2 fold superiority by body-weight and, sex and age equivalent, an appreciable superiority by brachial crosssectional area.iii F\D-H^5&5
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