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通过逐月测定毛发生长各项参数,印证人类毛发生长是否确随季节变化。受试对象为14名白人健康男子,年龄18至35岁,室内工作者,居住在谢菲尔德(北纬53.4°)。在18个月中,他们按要求收集剃下的胡须、脱落的头发、剪下的指(趾)甲和记录室外活动时间。每28天随访一次,以取得上述各项资料,并从头皮的5个部位及大腿腹侧取得毛发标本,测量各项数据。各项资料经统计学处理。结果:受试者室外活动时间有明显季节变化,夏季比冬季长,每周平均数在6、7月份为30小时,1、2月份为11小时。
By measuring the parameters of hair growth month by month, it is confirmed whether human hair growth changes with the season. The subjects were 14 white healthy men, aged 18 to 35, and indoor workers living in Sheffield (53.4 ° N). In 18 months, they collected shaved beards, shedding hair, cut nails and recorded outdoor activity on demand. Every 28 days follow-up to obtain the above information, and from the scalp of 5 parts and thighs to obtain hair samples, measuring the data. The information processed by statistics. Results: There was a significant seasonal change in the outdoor activities of the subjects. The summer was longer than the winter. The average weekly number was 30 hours in June and July and 11 hours in January and February.