Background: Chronic diseases such as hypertension and diabetes have shown improvement in disease condition on isotonic exercises. But the same can cause deterioration in the health of patients with asthma, heart failure, and chronic obstructive pulmonary disease. Therefore, in such individuals, isometric exercise can be given a try. Isometric exercise is known to activate the autonomic nervous system, especially the parasympathetic fibers and thus has a bearing on the functioning of respiratory system.
Aims and Objectives: This study was undertaken with a purpose to find acute change in respiratory reserve during handgrip exercise.
Materials and Methods: 50 young apparently healthy volunteers between the ages of 18 to 35 years were enrolled for the study. Different spirometry volumes and capacities including inspiratory reserve volume (IRV) and expiratory reserve volume (ERV) were recorded on MedSpiror (RMS, Chandigarh, India) at baseline and during sustained hand grip using a hand dynamometer. Statistical analysis was done using SPSS 17.0 on the data obtained.
Result: This study showed that FVC was significantly reduced during handgrip exercise. FEV1, PEFR, FEF 2575% and IRV decreased while FEV1/FVC and ERV increased but these changes were not significant statistically.
Conclusion: The reserve capacity of the lung does not change significantly during isometric exercise.
Key words: handgrip exercise, FVC, FEV1, PEFR, FEF 25-75%, FEV1/FVC
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