Acute performance and physiological responses to upper-limb multi-set exercise to failure: Effects of external resistance and systemic hypoxia.
This study quantified performance and physiological responses during multi-set resistance exercise to failure at light versus moderate loads in normoxia and systemic hypoxia. On separate visits, fifteen resistance-trained adults performed barbell biceps curl exercise trials (6 sets to failure, 2 min...
| Publicado en: | European Journal of Sport Science Vol. 22; no. 12; pp. 1877 - 1889 |
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| Autores principales: | , , |
| Formato: | research tables/charts randomized controlled trial Journal Article |
| Publicado: |
Wiley-Blackwell
Dec2022
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=160508695&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 160508695 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 17461391 IX3 jtl: European Journal of Sport Science issn: 17461391 maglogo: Y pubinfo: dt: Dec2022 vid: 22 iid: 12 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 160508695 160508695 160508695 10.1080/17461391.2021.2002951 160508695 ppf: 1877 ppct: 12 formats: tig: atl: Acute performance and physiological responses to upper-limb multi-set exercise to failure: Effects of external resistance and systemic hypoxia. aug: au: Girard, Olivier Mariotti-Nesurini, Luca Malatesta, Davide affil: School of Human Sciences (Exercise and Sport Science), The University of Western Australia, Perth, Australia sug: subj: Exercise Physiology Evaluation Exercise Intensity Anoxia Therapy Treatment Outcomes Resistance Training Methods Task Performance and Analysis Human Randomized Controlled Trials Relaxation Altitude Simulations Inspiration, Respiratory Spectroscopy, Near-Infrared Muscles Physiology Electromyography Methods Biceps Brachii Muscles Physiology Oxygenation Monitoring, Physiologic Descriptive Statistics Environmental Exposure Adverse Effects ab: This study quantified performance and physiological responses during multi-set resistance exercise to failure at light versus moderate loads in normoxia and systemic hypoxia. On separate visits, fifteen resistance-trained adults performed barbell biceps curl exercise trials (6 sets to failure, 2 min rest between sets) in four separate randomised conditions; i.e. in normoxia at 380 m above sea level or systemic hypoxia at ∼3800 m simulated altitude (inspired oxygen fraction = 20.9% and 12.9%, respectively) combined with two different intensity levels (30% and 70% of 1 repetition maximal or 1RM). Muscle activation (root mean square value calculated from surface electromyography) and oxygenation (integrated-tissue saturation index derived from near-infrared spectroscopy) were monitored for the biceps brachii muscle. The total number of repetitions before failure at 30% 1RM (122 ± 5 vs. 131 ± 5; P = 0.021), but not 70% 1RM (39 ± 1 vs. 41 ± 2; P = 0.313), was lower in hypoxia compared to normoxia. Root mean square activity of the biceps brachii muscle was higher for 70% 1RM compared to 30% 1RM (P < 0.001), while the increase in muscle activation from the first to the last set (P < 0.001) occurred independently of altitude (P > 0.158). Deoxygenation and reoxygenation responses were higher under hypoxic versus normoxic conditions at 70% 1 RM (P = 0.013 and P = 0.015) but not 30% 1RM (P = 0.528 and P = 0.384). During upper-limb multi-set resistance exercise to failure, exposure to acute normobaric hypoxia negatively impacts performance at light, but not moderate, loads. Overall, external resistance has more profound effects on physiological strain than hypoxic exposure per se. Highlights The addition of acute systemic hypoxia negatively affects work performed at low, but not moderate, loads during upper-limb resistance exercise to failure. Hypoxic exposure, however, does not fundamentally alter muscle activation and oxygenation patterns. Muscle activation and oxygenation responses in turn are more largely influenced by load lifted. pubtype: Academic Journal doctype: research tables/charts randomized controlled trial Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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