Patrick Rodrigues, Lucas B R Orssatto, Gabriel S Trajano, Lee Wharton, Geoffrey M Minett
{"title":"The effects of acute hot-water immersion on force steadiness and motor unit discharge rate variability in young, healthy adults.","authors":"Patrick Rodrigues, Lucas B R Orssatto, Gabriel S Trajano, Lee Wharton, Geoffrey M Minett","doi":"10.1139/apnm-2024-0330","DOIUrl":null,"url":null,"abstract":"<p><p>This study examined the effects of core and muscle temperature on force steadiness and motor unit discharge rate (MUDR) variability after a hot-water immersion session. Fifteen participants (6 women; 25 ± 6 years) completed neuromuscular assessments before and after either 42 °C (hot) or 36 °C (control) water immersion. Force steadiness was measured during knee extension, while HD-sEMG signals were recorded from <i>vastus lateralis</i> and <i>medialis</i> for MUDR variability analysis. Following water immersion, force steadiness decreased by 0.11% (<i>p</i> < 0.05; <i>d</i> = 0.38) and MUDR variability increased by 1.25% (<i>p</i> < 0.01; <i>d</i> = 0.57) potentially driven by increased muscle temperature. Elevated core temperature did not further affected these changes.</p>","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":"50 ","pages":"1-7"},"PeriodicalIF":0.0000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1139/apnm-2024-0330","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
This study examined the effects of core and muscle temperature on force steadiness and motor unit discharge rate (MUDR) variability after a hot-water immersion session. Fifteen participants (6 women; 25 ± 6 years) completed neuromuscular assessments before and after either 42 °C (hot) or 36 °C (control) water immersion. Force steadiness was measured during knee extension, while HD-sEMG signals were recorded from vastus lateralis and medialis for MUDR variability analysis. Following water immersion, force steadiness decreased by 0.11% (p < 0.05; d = 0.38) and MUDR variability increased by 1.25% (p < 0.01; d = 0.57) potentially driven by increased muscle temperature. Elevated core temperature did not further affected these changes.