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Respiratory Effects of Thoracic Load Carriage Exercise and Inspiratory Muscle Training as a Strategy to Optimize Respiratory Muscle Performance with Load Carriage

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Abstract

Many occupational and recreational settings require the use of protective and/or load-bearing apparatuses worn over the thoracic cavity, known as thoracic load carriage (LC). Compared to normal, unloaded exercise, thoracic LC exercise places an additional demand on the respiratory and limb locomotor systems by altering ventilatory mechanics as well as circulatory responses to exercise, thus accelerating the development of fatigue in the diaphragm and accessory respiratory muscles compared to unloaded exercise. This may be a consequence of the unique demands of thoracic LC, which places an additional mass load on the thoracic cavity and can restrict chest wall expansion. Therefore it is important to find effective strategies to ameliorate the detrimental effects of thoracic LC. Inspiratory muscle training is an intervention that aims to increase the strength and endurance of the diaphragm and accessory inspiratory muscle and may therefore be a useful strategy to optimize performance with thoracic LC.

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Acknowledgements

R.-J.S. is supported by 5T32HL105346-08 from the National Heart, Lung, and Blood Institute (NHLBI) of the National Institutes of Health.

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Authors and Affiliations

  1. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, MCLM 770, 1918 University Boulevard, Birmingham, AL, 35294-0006, USA

    Ren-Jay Shei

  2. Gregory Fleming James Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, AL, USA

    Ren-Jay Shei

  3. Department of Kinesiology, School of Public Health-Bloomington, Indiana University, Bloomington, IN, USA

    Robert F. Chapman, Allison H. Gruber & Timothy D. Mickleborough

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  1. Ren-Jay Shei
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  2. Robert F. Chapman
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  3. Allison H. Gruber
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  4. Timothy D. Mickleborough
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Correspondence to Ren-Jay Shei.

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Endorsed by Timothy D. Mickleborough.

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Shei, RJ., Chapman, R.F., Gruber, A.H. et al. Respiratory Effects of Thoracic Load Carriage Exercise and Inspiratory Muscle Training as a Strategy to Optimize Respiratory Muscle Performance with Load Carriage. Springer Science Reviews 5, 49–64 (2017). https://doi.org/10.1007/s40362-017-0046-5

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