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Comparison of forced expiratory flow at 25-75% (FEF25-75) of expiratory flow volume (FEF25-75) of the study participants after 12 weeks of study period. SPG: Slow pranayama group, FPG: Fast pranayama group, CG: Control group. Analysis done by Student's paired t-test. *P < 0.05, **P < 0.01, ***P < 0.001
