고교야구선수의 동계훈련이 심폐기능에 미치는 영향

Effect of winter intensive training on pulmonary function in high school baseball players

&nbsp;&nbsp;To evaluate the effect of winter intensive training on pulmonary function in high school baseball players, comparisons of various ventilatory parameters were made before and 3 months of winter intensive training.<BR>&nbsp;&nbsp;The subjects were 18 members of a high school baseball players with mean age and carrer of 6.45 and 17 years, respectively.<BR>&nbsp;&nbsp;The following were mainly observed by spirometry for the study ; respiratiory rate, vital capacity(VC), maximum voluntary ventilation(MVV), forced expiratory volume for 1 second(FEV1), percent FEV1 to forced vital capacity (FEV1 %) and forced mid-expiratory f1ow(FEF25-75%).<BR>&nbsp;&nbsp;The result obtanied are summarized as follow.<BR>&nbsp;&nbsp;1. Resipratory rate, tidal volume, forced viatl capacity, 1FEV%, FEF50% and FEF75% showed no significant difference between before and after.<BR>&nbsp;&nbsp;2. MVV in after was significantly(p＜.001) increased to 166 l /min comparing with 136 l /min in before.<BR>&nbsp;&nbsp;3. 1FEV in after was significantly(p＜.05) increased to 4.46 l comparing with 3.76 l in brfore.<BR>&nbsp;&nbsp;4. PEF in after was significantly(p＜.05) increased to 10.40 l /sec comparing with 9.18 l /sec in before.<BR>&nbsp;&nbsp;5. FEF25% in after was significantly(p＜.01) increased to 9.30 L/sec comparing with 8.08 l/sec in before.<BR>&nbsp;&nbsp;This suggests that enhanced venyilatory functions in high school baseball players after winter intensive training are primarily due to increased in MVV caused by increase in respiratory muscle strengh.