Neuromuscular responses during different hand positions in indoor rock climbing
DOI:
https://doi.org/10.11606/issn.1981-4690.2022e36207112Keywords:
Electromyography, Maximal isometric voluntary contraction, Flexor carpi radialis, Extensor digitorum communisAbstract
The aim of the study was to compare the neuromuscular responses of the wrist and digits extensors and flexors among four hand positions in indoor rock climbing. Twelve men (33.00±8.30 years) practitioners of indoor rock climbing underwent a skin preparation to the electromyography (EMG) signal data collection from the flexor carpi radialis (FCR) and extensor digitorum communis (EDC). After randomize the hand positions configurations (cambered, pinch, open and crimp), subjects were placed in the structure of the indoor rock climbing supported with their feet and hands in four holds. The EMG data were collected three times during 10 s, with 1 min interval. The cambered showed significant greater EMG values for the FCR compared to open and crimp hand positions (Cambered: 119.05±69.08 %; Pinch: 91.92±39.36 %; Open: 78.28±52.89 %; Crimp: 71.86±45.65 %). For the EDC, it was verified that the cambered presented significant lower values than pinch and crimp hand positions (Cambered: 20.59±16.04 %; Pinch: 58.68±64.10 %; Open: 61.51±74.04 %; Crimp: 55.32±57.29). Thus, the hand position configuration exerts influence in the muscular activity of wrist and digits extensors and flexors. Thus, the knowledge of the muscular activity in different hand positions configurations may bring relevant information to optimize the physical training in indoor rock climbing.
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