To evaluate the effect of intensive training on ventilatory functions in soccer players,
comparisons of various ventilatory parameters were made before and after 5-5.5 months
of intensive training. The subjects were 15 members of a university soccer team with
mean age and career of 19.9 and 8.3 years, respectively. Ventilatory parameters studied
were those obtained by the analyses of forced expiratory volume and maximal
expiratory flow-volume cuties, as well as spirometric measurements of VC and MVV.
After intensive training, volume parameters, such as VC, FVC and FSV1 &
3 as well as flow parameters, effort-dependent and effort-independent, such as
MVV, FEF200-1200, FEF25-75%, PEF, FEF25%, FEP50%, FEP75% showed significant
increase. However, when the observed values of flow parameters were volume-adjusted
to FVC, the differences before and after intensive training became insignificant. This
suggests that enhanced ventilatory functions in soccer players after intensive training
are primarily due to increase in FVC caused by increase in respiratory muscle strength.
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