We must encourage the use of the spirometer as part of routine examination of nearly all adult patients. Despite the theoretical problems of the water spirometer and its Poor frequency response, the water spirometer is adequate for the physiological function tests even in healthy people. The aim of this study was to report the pulmonary function studies of athletic swimmers. Subjects were 85 athletic swimmers from 9 to 25 years of age. They were elementary school boys and girls, middle school boys and girls, high school boys and girls, and college students. The results are as follows: 1) Frequency of breath: (cycle/min, M±SD) Elementary school boys show 19±4.7, elementary school girls 22±7.9, middle school boys 17±2.4, middle school girls 18±8.2, high school boys 15±3.4, high school girls 15±9.7, and college male students 12±3.2. 2) Vital capacity: (1, M±SD) Elementary school boys show 2.60±0.480, elementary school girls 2.22±0.412, middle school boys 3.63±0.598, middle school girls 2.80±0.303, high school boys 4.70±0.487, high school girls 3.23±0.509, and college male students 4.30±0.608. 3) Tidal volume: (ml, M±SD) Elementary school boys show 462±59, elementary school girls 395±110, middle school boys 524±78, middle school girls 421±59, high school boys 612±101, high school girls 494±123, and college male students 603±121. 4) Breath holding time: (sec, M±SD) Elementary school boys show 58±21.2, elementary school girls 36±11.1, middle school boys 61±16.7. middle school girls 53±21.0, high school boys 64±9.1, high school girls 49±15.3, and college male students 81±23.0.
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