The effect of inspiratory muscle training on respiratory and limb locomotor muscle deoxygenation during exercise with resistive inspiratory loading.

TURNER, Louise, TECKLENBURG-LUND, S.L., CHAPMAN, R., SHEI, R.J., WILHITE, D.P. and MICKLEBOROUGH, T. (2016). The effect of inspiratory muscle training on respiratory and limb locomotor muscle deoxygenation during exercise with resistive inspiratory loading. International Journal of Sports Medicine, 37 (8), 598-606.

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Link to published version:: https://doi.org/10.1055/s-0042-104198
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    Abstract

    We investigated how inspiratory muscle training impacted respiratory and locomotor muscle deoxygenation during submaximal exercise with resistive inspiratory loading. 16 male cyclists completed 6 weeks of either true (n=8) or sham (n=8) inspiratory muscle training. Pre- and post-training, subjects completed 3, 6-min experimental trials performed at ~80%  ˙VO2peak with interventions of either moderate inspiratory loading, heavy inspiratory loading, or maximal exercise imposed in the final 3 min. Locomotor and respiratory muscle oxy-, deoxy-, and total-haemoglobin and myoglobin concentration was continuously monitored using near-infrared spectroscopy. Locomotor muscle deoxygenation changes from 80%  ˙VO2peak to heavy inspiratory loading were significantly reduced pre- to post-training from 4.3±5.6 µM to 2.7±4.7 µM. Respiratory muscle deoxygenation was also significantly reduced during the heavy inspiratory loading trial (4.6±3.5 µM to 1.9±1.5 µM) post-training. There was no significant difference in oxy-, deoxy-, or total-haemoglobin and myoglobin during any of the other loading trials, from pre- to post-training, in either group. After inspiratory muscle training, highly-trained cyclists exhibited decreased locomotor and respiratory muscle deoxygenation during exercise with heavy inspiratory loading. These data suggest that inspiratory muscle training reduces oxygen extraction by the active respiratory and limb muscles, which may reflect changes in respiratory and locomotor muscle oxygen delivery.

    Item Type: Article
    Research Institute, Centre or Group - Does NOT include content added after October 2018: Centre for Sport and Exercise Science
    Identification Number: https://doi.org/10.1055/s-0042-104198
    Page Range: 598-606
    Depositing User: Alison Beswick
    Date Deposited: 01 Aug 2016 10:54
    Last Modified: 18 Jan 2019 09:23
    URI: http://shura.shu.ac.uk/id/eprint/12931

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