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在适度的锻炼期间,黑种人的心率比白种人快。此发现表明,黑种人和白种人对于紧张的反应有着遗传上的差异。设在查珀尔希尔的北卡罗来纳州立大学的卡斯G·埃克劳德和他的同事们在全国范围内,通过对2548位白种男人和83位黑种男人进行踏旋器试验,
Blacks have a faster heart rate than Caucasians during modest workouts. This finding suggests that blacks and whites have a genetic difference in the response to stress. Kas G Eklud and his colleagues at North Carolina State University in Chapel Hill have tested the pedigree of 2548 white men and 83 black men across the country,