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KMID : 1211620150100010083
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Journal of the Korean Society of Physical Medicine
2015 Volume.10 No. 1 p.83 ~ p.89
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Comparison of Forced Vital Capacity and Maximal Voluntary Ventilation Between Normal and Forward Head Posture
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Han Jin-Tae
Ko Min-Ji
Kim Young-Ju
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Abstract
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PURPOSE: The purpose of this study was to investigate the vital capacity and maximal voluntary ventilation in subjects with forward head posture (FHP).
METHODS: Twenty-eight subjects participated in this study (normal 14, FHP 14) and were resident in B city. The mean age, height and weight of subjects was 22.80yrs, 169.36cm and 62.79kg. Subjects were asked to breath maximally for FVC and repeatedly for MVV during 12 seconds. The variables of data were collected as follows: Forced Vital Capacity(FVC), Forced Expiratory Volume in One Second(FEV1), FEV1/FVC, Maximal Voluntary Ventilation(MVV). Each trial was performed by 3 times and we used the means to analyze the data. The mann-whitney U test and independent t-test were used to compare the vital capacity between normal and FHP subjects. All statistical analyses were performed using SPSS 21.0 for window version and p-values less than 0.05 were used to identify significant differences.
RESULTS: The FVC, FEV1, FEV1/FVC and MVV of FHP subjects were decreased more than that of normal subjects and the difference was statistically significant between two groups.
CONCLUSION: The vital capacity of subjects with FHP was generally lower than normal subjects. This study shows that the vital capacity of subjects with FHP could be decreased due to the bad neck posture that weakens the respiratory accessory muscles of neck.
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KEYWORD
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Forward head posture, Forced vital capacity, Maximal voluntary ventilation
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