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Underwater near infrared spectroscopy (uNIRS) can measure training adaptations in adolescent swimmers

Jones, B and Parry, D and Cooper, CE (2018) 'Underwater near infrared spectroscopy (uNIRS) can measure training adaptations in adolescent swimmers.' PeerJ, 6 (4). e4393-e4393. ISSN 2167-8359

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The development of an underwater near-infrared spectroscopy (uNIRS) device has enabled previously unattainable measurements of peripheral muscle hemodynamics and oxygenation to be taken within the natural aquatic environment. The purposes of this study were (i) to trial the use of uNIRS, in a real world training study, and (ii) to monitor the effects of a swim training program upon muscle oxygenation status in short distance swimming. 14 junior club level swimmers completed a repeated swim sprint test before and after an eight week endurance training program. A waterproof, portable NIRS device was attached to the vastus lateralis. uNIRS successfully measured changes in muscle oxygenation and blood volume in all individuals; rapid sub-second time resolution of the device was able to demonstrate muscle oxygenation changes during the characteristic swim movements. Post training heart rate recovery and swim performance time were significantly improved. uNIRS data also showed significant changes. A larger rise in deoxyhemoglobin during individual sprints suggested training induced an increase in muscle oxygen extraction; a faster recovery time for muscle oxygenation suggested positive training induced changes and significant changes in muscle blood volume also occur. As a strong correlation was seen between an increased reoxygenation rate and an improved swim performance time, these findings support the use of uNIRS as a new performance analysis tool in swimming.

Item Type: Article
Uncontrolled Keywords: Adolescents; Near-infrared spectroscopy; Muscle oxygenation; Swimming; Training
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sport
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Faculty of Science and Health
Faculty of Science and Health > Sport, Rehabilitation and Exercise Sciences, School of
Faculty of Science and Health > Life Sciences, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 15 May 2018 13:41
Last Modified: 18 Aug 2022 11:41

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