Core and skin temperature influences on the surface electromyographic responses to an isometric force and position task
Coletta NA, Mallette MM, Gabriel DA, Tyler CJ, Cheung SS
PloS one · 12 citas
Cómo se estudió
- Diseño
- Ensayo clínico controlado (clasificado por nuestro filtro de IA)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
- Gobierno
- Natural Sciences and Engineering Research Council of Canada
- Gobierno
- Natural Sciences and Engineering Research Council of Canada (CA)
- Subvenciones
- Natural Sciences and Engineering Research Council of Canada (#227912‐12)
Según 2 financiadores declarados y la declaración de financiación del texto completo.
Publicación
- Publicado
- 2018-03-29 · PLoS One · vol. 13 · número 3 · pág. e0195219
- Editorial
- Public Library of Science
- Citado
- 27 citas · más que el 83% de estudios similares · 1.7× el promedio de su campo
- Referencias
- 43 trabajos
- Acceso
- Acceso abierto (revista) · CC-BY
- Áreas de investigación
- Thermoregulation and physiological responses · Infrared Thermography in Medicine · Sports Performance and Training
- Palabras clave
- Isometric exercise, Electromyography, Amplitude, Wrist, Contraction (grammar), Physical medicine and rehabilitation, Physics, Mathematics, Biomedical engineering, Materials science, Anatomy, Medicine, Physical therapy, Internal medicine, Optics
- MeSH
- muscle, skeletal, neuromuscular junction, humans, electromyography, body temperature, skin temperature, physical endurance, muscle contraction, isometric contraction, adult, female, male, young adult
5 autores
- Nico A. Coletta🇨🇦Brock University
- Matthew M. Mallette🇨🇦Brock University
- David A. Gabriel🇨🇦Brock University
- Christopher J. Tyler🇬🇧University of Roehampton
- Stephen S. Cheung🇨🇦 · autor de correspondenciaBrock University
Resumen
El texto original del estudio, en el idioma en que se publicó.
The large body of work demonstrating hyperthermic impairment of neuromuscular function has utilized maximal isometric contractions, but extrapolating these findings to whole-body exercise and submaximal, dynamic contractions may be problematic. We isolated and compared core and skin temperature influences on an isometric force task versus a position task requiring dynamic maintenance of joint angle. Surface electromyography (sEMG) was measured on the flexor carpi radialis at 60% of baseline maximal voluntary contraction while either pushing against a rigid restraint (force task) or while maintaining a constant wrist angle and supporting an equivalent inertial load (position task). Twenty participants performed each task at 0.5°C rectal temperature (Tre) intervals while being passively heated from 37.1±0.3°C to ≥1.5°C Tre and then cooled to 37.8±0.3°C, permitting separate analyses of core versus skin temperature influences. During a 3-s contraction, trend analysis revealed a quadratic trend that peaked during hyperthermia for root-mean-square (RMS) amplitude during the force task. In contrast, RMS amplitude during the position task remained stable with passive heating, then rapidly increased with the initial decrease in skin temperature at the onset of passive cooling (p = 0.010). Combined hot core and hot skin elicited shifts toward higher frequencies in the sEMG signal during the force task (p = 0.003), whereas inconsistent changes in the frequency spectra occurred for the position task. Based on the patterns of RMS amplitude in response to thermal stress, we conclude that core temperature was the primary thermal afferent influencing neuromuscular response during a submaximal force task, with minimal input from skin temperature. However, skin temperature was the primary thermal afferent during a position task with minimal core temperature influence. Therefore, temperature has a task-dependent impact on neuromuscular responses.
Resumen vía Europe PMC. Los derechos de autor siguen siendo de los autores o la editorial (CC BY).
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