RELIABILITY OF NEAR-INFRARED SPECTROSCOPY FOR MEASURING INTERMITTENT HANDGRIP CONTRACTIONS IN SPORT CLIMBERS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11510%2F18%3A10375706" target="_blank" >RIV/00216208:11510/18:10375706 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

RELIABILITY OF NEAR-INFRARED SPECTROSCOPY FOR MEASURING INTERMITTENT HANDGRIP CONTRACTIONS IN SPORT CLIMBERS

Original language description

The use of near-infrared spectroscopy (NIRS) to investigate muscle oxygenation changes during physical tasks such as rock climbing has rapidly increased within recent years; yet, there is no known measure of reliability. The current study aimed to determine intersession reliability and minimal detectable change (MDC) of continuous wave NIRS parameters during intermittent handgrip contractions in rock climbers. Thirty-two sport climbers were tested for exhaustive intermittent handgrip exercise (8-second contraction-2-second relief) at 60% of maximal voluntary contraction on 3 separate days. During each visit, continuous wave NIRS was used to determine tissue saturation index (TSI) as the measure of tissue oxygenation in the flexor digitorum profundus. To assess the intersession reliability, the intraclass correlation coefficient (ICC), SEM, coefficient of variation (CV), and MDC were used. Mean deoxygenation during the contractions provided reliable results (Delta TSI; first trial -8.9 +/- 2.9%, second trial -8.8 +/- 2.7%, and third trial -8.4 +/- 2.6%; ICC = 0.692; SEM = 1.5%; CV = 17.2%; MDC = 4.2%). Mean muscle reoxygenation during the relief periods was similarly reliable (. TSI; first trial 9.0 +/- 3.1%, second trial 8.8 +/- 2.9%, and third trial 8.5 +/- 2.7%; ICC = 0.672; SEM = 1.7%; CV = 19.0%, MDC = 4.7%). As such, continuous wave NIRS provides a reliable measure of deoxygenation and reoxygenation during intermittent contractions to failure in the forearm flexors of rock climbers. Differences exceeding similar to 4.5% for Delta TSI during contraction and relief periods should be considered meaningful.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

30306 - Sport and fitness sciences

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Strength and Conditioning Research

ISSN

1064-8011

e-ISSN

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Volume of the periodical

32

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

494-501

UT code for WoS article

000428745500024

EID of the result in the Scopus database

2-s2.0-85049271652