| Titre : | Torque and Discomfort During Electrically Evoked Muscle Contractions in Healthy Young Adults: Influence of Stimulation Current and Pulse Frequency (2023) |
| Auteurs : | Anders Gravholt ; Jon Herskind ; Christoffer Tiedemann Kloster ; Lars G. Hvid ; Kristian Overgaard |
| Type de document : | Article |
| Dans : | Archives of Physical Medicine and Rehabilitation (Vol. 104, n° 3, 2023) |
| Article en page(s) : | p. 444-450 |
| Langues: | Anglais |
| Descripteurs : |
HE Vinci Contraction isométrique ; Jeune adulte (19-24 ans) ; Moment de torsion ; Pain ; Réadaptation ; Stimulation électrique |
| Résumé : | Objective To investigate (1) how current and pulse frequency of electrical stimulation (ES) as well as contraction mode (isometric, concentric, and eccentric) influence torque output and discomfort and (2) how familiarization by repeated ES sessions influences ratings of perceived discomfort. Design An experimental study, 3 sessions. Setting A university laboratory. Participants Eight healthy participants (5 men, 3 women; mean age 25.2 years; N=8). Interventions Participants completed 3 trial days, each including 17 electrically evoked thigh muscle contractions. On each trial day, the first 6 contractions consisted of 2 isometric, 2 concentric, and 2 eccentric muscle contractions randomly ordered with a fixed stimulation current and pulse frequency (200 mA, 20 Hz), while the remaining 11 muscle contractions were all isometric with randomly ordered combinations of current (100-250 mA) and pulse frequency (20-100 Hz). Main Outcome Measures Torque and perceived discomfort were measured for each ES-evoked contraction. Results Overall, the findings revealed that a higher stimulation frequency was associated with an increased torque without increased discomfort, while higher currents were associated with increases of both torque and discomfort. Contraction type did not influence level of discomfort, despite eccentric contractions eliciting higher torque compared with concentric and isometric contractions (P<.001 finally a significant familiarization to es was observed after just of identical stimulation sessions. conclusions the outlined data suggest that elicit high torque levels while minimizing discomfort in young subjects eccentric muscle contractions evoked with low current and pulse frequency are preferable. furthermore single session significantly lowers rating perceived during es.> |
| Disponible en ligne : | Oui |
| En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.sciencedirect.com/science/article/pii/S0003999322016045 |
Bibliothèques HE Vinci
