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Titre : | Whole Body Oxygen Uptake and Evoked Torque During Subtetanic Isometric Electrical Stimulation of the Quadriceps Muscles in a Single 30-Minute Session (2014) |
Auteurs : | Conor M. Minogue ; Brian M. Caulfield ; Madeleine M. Lowery |
Type de document : | Article |
Dans : | Archives of Physical Medicine and Rehabilitation (2014/9, 2014) |
Article en page(s) : | p. 1750-1758 |
Langues: | Anglais |
Descripteurs : |
HE Vinci Fatigue ; Rééducation et réadaptation |
Mots-clés: | Electric stimulation ; Stimulation électrique ; Oxygen consumption ; Consommation d'oxygène |
Résumé : |
Objective To evaluate the time course of fatigue in torque output and oxygen uptake during isometric subtetanic neuromuscular electrical stimulation (NMES) to facilitate the design of NMES-based rehabilitation protocols that can accumulate a defined aerobic exercise volume within a given time period. Design Single-arm intervention study with within-subject comparisons. Setting University research laboratory. Participants Volunteer sample of healthy men (N=11; mean age, 34.2+11.5y; range, 1953y; body mass, 79.1+11.7kg; range, 58100kg). Intervention A single 30-minute session of continuous bilateral isometric quadriceps NMES at 4Hz evoking a mean twitch amplitude of 12% of the maximum voluntary contraction. Main Outcome Measures Whole body oxygen consumption rate (Vo2), and evoked torque were measured simultaneously throughout. Results Mean increment in Vo2 was 596+238mL/min, and average exercise intensity during the session was 3+.47 metabolic equivalents. The Vo2 and torque declined slowly at a rate of −.54%+.31% and −.47%+.57% per minute, respectively. Conclusions Despite having a higher incremental Vo2, the observed fatigue rate was considerably less than that previously reported during intermittent isometric tetanic stimulation, suggesting that subtetanic isometric NMES is more sustainable for exercise interventions aimed at accumulating a therapeutic aerobic exercise volume. |
Disponible en ligne : | Oui |
En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.sciencedirect.com/science/article/pii/S0003999314002871 |