Edwards, A.M., Graham, D., Bloxham, S., and Maguire, G.P. (2016) Efficacy of inspiratory muscle training as a practical and minimally intrusive technique to aid functional fitness among adults with obesity. Respiratory Physiology & Neurobiology, 234. pp. 85-88.

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Abstract

Objective: To examine the efficacy of inspiratory muscle training (IMT) as a non-intrusive and practical intervention to stimulate improved functional fitness in adults with obesity. As excess adiposity of the chest impedes the mechanics of breathing, targeted re-training of the inspiratory muscles may ameliorate sensations of breathlessness, improve physical performance and lead to greater engagement in physical activity.

Methods: Sixty seven adults (BMI = 36 ± 6.5) were randomized into either an experimental (EXP: n = 35)or placebo (PLA: n = 32) group with both groups undertaking a 4-week IMT intervention, comprising dailyuse of a inspiratory resistance device set to 55% (EXP), or 10% (PLA) of maximum inspiratory effort.

Results: Inspiratory muscle strength was significantly improved in EXP (19.1 cmH20 gain; P < 0.01) but didnot change in PLA. Additionally, the post training walking distance covered was significantly extended for EXP (P < 0.01), but not for PLA. Bivariate analysis demonstrated a positive association between the change (%) of performance in the walking test and BMI (r = 0.78; P < 0.01) for EXP.

Conclusion: The findings from this study suggest IMT provides a practical, self-administered intervention for use in a home setting. This could be a useful strategy to improve the functional fitness of obese adults and perhaps lead to better preparedness for engagement in physical activity initiatives.

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