The effects of sustained, low- and high-intensity isometric tasks on performance fatigability and the perceived responses that contributed to task termination.

التفاصيل البيبلوغرافية
العنوان:	The effects of sustained, low- and high-intensity isometric tasks on performance fatigability and the perceived responses that contributed to task termination.
المؤلفون:	Smith RW; Department of Nutrition and Health Sciences, University of NE - Lincoln, Lincoln, NE, 68510, USA. bsmith80@huskers.unl.edu., Ortega DG; Department of Nutrition and Health Sciences, University of NE - Lincoln, Lincoln, NE, 68510, USA., Arnett JE; Department of Nutrition and Health Sciences, University of NE - Lincoln, Lincoln, NE, 68510, USA., Neltner TJ; Department of Health and Human Performance, University of Wisconsin-Platteville, Platteville, WI, 53818, USA., Schmidt RJ; Department of Nutrition and Health Sciences, University of NE - Lincoln, Lincoln, NE, 68510, USA., Johnson GO; Department of Nutrition and Health Sciences, University of NE - Lincoln, Lincoln, NE, 68510, USA., Weir JP; Department of Health, Sport and Exercise Sciences, University of Kansas, Lawrence, KS, 66045, USA., Housh TJ; Department of Nutrition and Health Sciences, University of NE - Lincoln, Lincoln, NE, 68510, USA.
المصدر:	European journal of applied physiology [Eur J Appl Physiol] 2024 May; Vol. 124 (5), pp. 1587-1599. Date of Electronic Publication: 2024 Jan 02.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: Springer-Verlag Country of Publication: Germany NLM ID: 100954790 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1439-6327 (Electronic) Linking ISSN: 14396319 NLM ISO Abbreviation: Eur J Appl Physiol Subsets: MEDLINE
أسماء مطبوعة:	Original Publication: Berlin ; New York : Springer-Verlag, c2000-
مواضيع طبية MeSH:	Muscle Fatigue/physiology , Isometric Contraction/physiology , Physical Exertion*/physiology, Humans ; Male ; Young Adult ; Muscle, Skeletal/physiology ; Perception/physiology ; Adult ; Torque
مستخلص:	Purpose: The present study examined the effects of sustained, isometric low- versus high-intensity tasks on time to task failure (TTF), performance fatigability (PF), ratings of perceived exertion (RPE), and the perceived causes of task termination from a post-test questionnaire (PTQ). Methods: Ten men (mean ± SD: age = 21.1 ± 2.3 years; height = 180.2 ± 5.7 cm; body mass = 79.5 ± 8.8 kg) performed maximal voluntary isometric contractions (MVICs) before and after fatiguing, isometric forearm flexion tasks anchored to the torque corresponding to RPE values of 2 (TRQ2FT = 23.8 ± 7.1 N·m) and 8 (TRQ8FT = 60.9 ± 11.4 N·m). In addition, the subjects completed a PTQ which surveyed whether the perceived sensations of fatigue or pain, and/or the psychological factors of loss of focus and motivation contributed to the decision to terminate the task. Repeated measures ANOVAs, Wilcoxon-Signed Rank tests, and Spearman's Rank-Order Correlations were used to analyze the data. Results: Across the fatiguing tasks, there were similar decreases in MVIC torque (95.2 ± 20.3 vs. 68.9 ± 15.6 N·m; p < 0.001) and RPE values (p = 0.122) at task failure for TRQ2FT (7.4 ± 2.7) and TRQ8FT (8.9 ± 1.0), but a longer (p = 0.005) TTF for the TRQ2FT (245.0 ± 177.0 s) than TRQ8FT (36.8 ± 11.1 s). Conclusions: Despite reaching task failure, the subjects were able to perform MVICs that were 100-300% greater than the target torque values within seconds of terminating the tasks. Thus, we hypothesized that task failure was not caused by an inability to produce sufficient torque to sustain the tasks, but rather an unwillingness to continue the task. (© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
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فهرسة مساهمة:	Keywords: Effort; Exertion; Motivation; Perceived fatigability; Performance fatigability
تواريخ الأحداث:	Date Created: 20240102 Date Completed: 20240427 Latest Revision: 20240427
رمز التحديث:	20240428
DOI:	10.1007/s00421-023-05396-w
PMID:	38165446
قاعدة البيانات:	MEDLINE

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تدمد:	1439-6327
DOI:	10.1007/s00421-023-05396-w