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In order to investigate the physical growth conditions of the Korean high school boys, the stature, span, upper extremity length, lower extremity length and body weight of 3,755 high school boys ranging from 16 to 19 years of age were measured. In addition, the correlation coefficients between the items were calculated by each age group. The results are summarized as follows: 1. The average stature showed 166.78㎝ in 16 years age group, 168.84㎝ in 18 years age group respectively, so the annual average growth in the stature was 1.0㎝, but the stature of 18 and 19 years age group showed almost the same records, and no significant difference between both age groups was observed in the stature. 2. The average span showed 166.71㎝ in 17 years age group, 168.93㎝ in 18 years age group respectively, so the annual average growth showed 1.11㎝, but the span of 18 and 19 years age group showed almost the same records and no significant difference between both age group was observed. 3. The average length of upper extremity showed 73.85㎝ in 16 years age group, 74.66㎝ in 17 years age group respectively, so the annual average growth showed 0.36㎝, but the records of 18 and 19 years age group showed almost the same records, and no significant difference between both age group was observed in the upper extremity length. 4. The average length of lower extremity showed 91.08㎝ in 16 years age group, 91.92㎝ in 18 years age group respectively, so the annual average growth showed 0.42㎝, but the records of 18 and 19 years age group showed almost the same records, and no significant difference between both age group was observed in the lower extremity length. 5. The average body weight showed 56.55㎏ in 16 years age group, 59.63㎏ in years age group, so the annual average growth in the body weight showed 1.5㎏, but the records between 18 to 19 years age group showed slight variation, and the annual average growth change in the body weight showed only 0.12㎏. 6. Judging from the all items mentioned above, it was found that the growth of Korean boys was rapid until 18 years of age and 18 years of age seem to be the completion period of actual growth. 7. The correlation coefficients between stature and span, and also between span and upper extremity showed very high value as more than 0.8 respectively. 8. The correlation coefficients between stature and lower extremity, between span and lower extremity, and also between upper extremity and lower extremity showed high value as more than 0.6 respectively. 9. The correlation coefficients between stature and body weight, span and body weight, upper extremity and body weight, and also between lower extremity and body weight showed middle value as less than 0.6. 10. All correlation coefficients between each item mentioned above have a tendency to reduce with the increase of age.
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