Four weeks of inspiratory muscle training improves self-paced walking performance in overweight and obese adults: a randomised controlled trial

Edwards, A.M., Maguire, G.P., Graham, D., Boland, V., and Richardson, G. (2012) Four weeks of inspiratory muscle training improves self-paced walking performance in overweight and obese adults: a randomised controlled trial. Journal of Obesity, 2012. 918202. pp. 1-6.

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Objective: To examine whether a programme of inspiratory muscle training (IMT) improves accumulative distance of self-paced walking in overweight and obese adults.

Methods: A total of 15 overweight and obese adults were randomized into experimental (EXP: n=8) and placebo (PLA: n-7) groups. Lung function, inspiratory muscle performance, 6-minute walking test, and predicted VO2 max were assessed prior to and following the 4-week IMT intervention. Both groups performed 30 inspiratory breaths, twice daily using a proprietary inspiratory resistance device set to 55% of baseline maximal effort (EXP), or performing the same inspiratory training procedure at the minimum resistive setting (PLA).

Results: Lung function was unchanged in both groups after-training; however inspiratory muscle strength was significantly improved in EXP (19 ± 25.2 cm H2O gain; P<0.01) but did not significantly change in PLA. Additionally, the posttraining distance covered in the 6-minute walking test was significantly extended for EXP (62.5 ± 37.7 m gain; P<0.01), but not for PLA. A positive association was observed between the change (%) of performance gain in the 6-minute walking test and body mass index (r=0.736, m gain; P<0.05), but not for PLA.

Conclusion: The present study suggests that IMT provides a practical, minimally intrusive intervention to significantly augment both inspiratory muscle performance and walking distance covered by overweight and obese adults in a clinically relevant 6-minute walk test. This indicates that IMT may provide a useful priming (preparatory) strategy prior to entry in a physical training programme for overweight and obese adults.

Item ID: 22062
Item Type: Article (Research - C1)
ISSN: 2090-0716
Additional Information:

Copyright © 2012 A. M. Edwards et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Date Deposited: 28 Jun 2012 02:15
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1106 Human Movement and Sports Science > 110602 Exercise Physiology @ 80%
17 PSYCHOLOGY AND COGNITIVE SCIENCES > 1701 Psychology > 170114 Sport and Exercise Psychology @ 20%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920103 Cardiovascular System and Diseases @ 100%
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