Artikel ; Online: Relationship between neuromuscular fatigue, muscle activation and the work done above the critical power during severe-intensity exercise.
2022 Band 107, Heft 4, Seite(n) 312–325
Abstract: New findings: What is the central question of this study? Does the work done above critical power (W') or muscle activation determine the degree of peripheral fatigue induced by cycling time trials performed in the severe-intensity domain? What is the ... ...
Abstract | New findings: What is the central question of this study? Does the work done above critical power (W') or muscle activation determine the degree of peripheral fatigue induced by cycling time trials performed in the severe-intensity domain? What is the main finding and its importance? Peripheral fatigue increased when power output and muscle activation increased, whereas W' did not change between the time trials. Therefore, no relationship was found between W' and exercise-induced peripheral fatigue such as previously postulated in the literature. In contrast, we found a significant association between EMG amplitude during exercise and exercise-induced reduction in the potentiated quadriceps twitch, suggesting that muscle activation plays a key role in determining peripheral fatigue during severe-intensity exercise. Abstract: In order to determine the relationship between peripheral fatigue, muscle activation and the total work done above critical power (W'), 10 men and four women performed, on separated days, self-paced cycling time trials of 3, 6, 10 and 15 min. Exercise-induced quadriceps fatigue was quantified using pre- to postexercise (15 s to 15 min recovery) changes in maximal voluntary contraction (MVC) peak force, voluntary activation and potentiated twitch force (QT). Voluntary activation was measured using the interpolated twitch technique, and QT was evoked by electrical stimulations of the femoral nerve. Quadriceps muscle activation was determined using the root mean square of surface EMG of vastus lateralis (VL |
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Mesh-Begriff(e) | Electromyography ; Exercise/physiology ; Exercise Tolerance/physiology ; Female ; Humans ; Male ; Muscle Contraction/physiology ; Muscle Fatigue/physiology ; Muscle, Skeletal/physiology ; Quadriceps Muscle/physiology |
Sprache | Englisch |
Erscheinungsdatum | 2022-03-04 |
Erscheinungsland | England |
Dokumenttyp | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 1016295-1 |
ISSN | 1469-445X ; 0958-0670 |
ISSN (online) | 1469-445X |
ISSN | 0958-0670 |
DOI | 10.1113/EP090043 |
Datenquelle | MEDical Literature Analysis and Retrieval System OnLINE |
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