Published: March 11, 2022
a relação entre condição de hipóxia e função cognitiva (objetivo 1), bem como o exercício físico realizado em 2).Como resultado, foi relacionada com um baixo desempenho cognitivo, enquanto relacionado uma performance positiva, demonstrando os benefícios do sobre efeitos deletérios promovido pela hipóxia.
Scandinavian Journal of Medicine and Science in Sports, Journal Year: 2019, Volume and Issue: 30(3), P. 384 - 398
Published: Oct. 12, 2019
Acute moderate intensity exercise has been shown to improve cognitive performance. In contrast, hypoxia is believed impair The detrimental effects of on performance are primarily dependent the severity and duration exposure. this review, we describe how acute under alters performance, propose that combined mainly determined by interaction among duration, hypoxia, exposure hypoxia. We discuss physiological mechanism(s) suggest alterations in neurotransmitter function, cerebral blood flow, possibly metabolism primary candidates determine when with Furthermore, acclimatization appears counteract impaired during prolonged although precise responsible for amelioration remain be elucidated. This review implications sporting, occupational, recreational activities at terrestrial high altitude where essential. Further studies required understand mechanisms performed
Language: Английский
Citations
64
Anesthesiology, Journal Year: 2020, Volume and Issue: 134(2), P. 262 - 269
Published: Sept. 24, 2020
Severe hypoxemia presents variably, and sometimes silently, without subjective complaints of dyspnea. The adequacy cardiovascular compensation for oxygen delivery to tissues should be a focus in all hypoxemic patients.
Language: Английский
Citations
57
Journal of sport and health science/Journal of Sport and Health Science, Journal Year: 2020, Volume and Issue: 9(6), P. 562 - 577
Published: April 20, 2020
This study aimed to examine (1) the independent effects of hypoxia on cognitive function and (2) exercise cognition while under hypoxia.
Language: Английский
Citations
49
Biology, Journal Year: 2022, Volume and Issue: 11(2), P. 309 - 309
Published: Feb. 15, 2022
The aim of this study was to examine the acute effects different levels hypoxia on maximal strength, muscular endurance, and cognitive function in males females. In total, 13 (mean ± SD: age, 23.6 2.8 years; height, 176.6 3.9 cm; body mass, 76.6 2.1 kg) females 22.8 1.4 166.4 1.9 61.6 3.4 volunteered for a randomized, double-blind, crossover study. Participants completed one repetition strength endurance test (60% maximum failure) squat bench press following four conditions; (i) normoxia (900 m altitude; FiO2: 21%); (ii) low dose (2000 16%); (iii) moderate (3000 14%); (iv) high (4000 12%). Heart rate, blood lactate, rating perceived exertion, also determined during each condition. (p = 0.33) 0.68) did not differ between conditions or sexes. Furthermore, 0.34). There significant decrease 0.02; p 0.04) 0.01; 0.01) doses both compared hypoxia, respectively. Cognitive function, ratings lactate were significantly < 0.05). rate 0.30). conclusion, normobaric upper performance regardless sex; however, lower are altered.
Language: Английский
Citations
14
International Journal of Environmental Research and Public Health, Journal Year: 2023, Volume and Issue: 20(4), P. 3629 - 3629
Published: Feb. 18, 2023
Memory impairment, reduced learning ability, decreased concentration, and psychomotor performance can be all signs of deleterious impact hypoxia on cognitive functioning. In turn, physical exercise improve enhance functions. The purpose this study was to investigate whether the potential positive effects performed under normobaric counteract negative function, these changes correlate with brain-derived neurotrophic factor (BDNF) concentrations. Seventeen healthy subjects participated in a crossover where they two sessions single breathing bouts combined moderate intensity conditions: normoxia (NOR EX) (NH EX). To assess Stroop test applied. There were no significant differences any part interference regardless conditions (NOR, NH), despite statistical decrease SpO
Language: Английский
Citations
7
Frontiers in Physiology, Journal Year: 2023, Volume and Issue: 14
Published: Oct. 11, 2023
Acute exposure to hypoxia can lead cognitive impairment. Therefore, may become a safety concern for occupational or recreational settings at altitude. Cognitive tests are used as tool assess the degree which affects performance. However, so many different that comparing studies is challenging. This structured literature evaluation provides an overview of effects acute on performance in healthy volunteers. Less frequently similar were clustered and classified into domains. Subsequently, test clusters compared sensitivity levels oxygen saturation. A total 38 articles complied with selection criteria, covering 86 tests. The showed most consistent found Stroop (where 42% demonstrated significant abnormalities). sensitive auditory/verbal memory: delayed recognition (83%); evoked potentials (60%); visual/spatial (50%); sustained attention (47%). Attention tasks not particularly (impairments 0%–47% studies). level-response relationship was ( p = 0.001), well three executive domain: inhibition 0.034), reasoning/association 0.019), working memory 0.024). shows higher more severe hypoxia, predominantly below 80% No influence barometric pressure could be identified limited number where this varied. review suggests complex functions hypoxia. Moreover, first step towards standardization testing, crucial better understanding cognition.
Language: Английский
Citations
7
Brain Sciences, Journal Year: 2019, Volume and Issue: 9(11), P. 323 - 323
Published: Nov. 14, 2019
Previous research has evaluated the effects of acute hypoxia exposure on cognitive function, notably executive function. No studies, to date, have memory interference, which was purpose this experiment.A within-subjects, counterbalanced experimental design employed, with condition (hypoxia vs. normoxia) and time (immediate delayed) being independent variables. Participants (N = 21; Mage 21.0 years) completed two laboratory visits, involving 30 min either (FIO2 0.12) or normoxia 0.21). Following this, they a interference task (AB/AC paradigm), assessing immediate delayed proactive retroactive interference.For we observed significant main effect for condition, F(1, 20) 5.48, p 0.03, ƞ2 0.10, by interaction, 4.96, 0.01, but no time, 1.75, 0.20, 0.004.Our results demonstrate that facilitative in reducing interference. We discuss these findings context potential therapeutic synaptic plasticity.
Language: Английский
Citations
15
Journal of Exercise Science & Fitness, Journal Year: 2022, Volume and Issue: 20(2), P. 100 - 107
Published: Jan. 26, 2022
The purpose of this study was to investigate the effects repeated sprint interval training (RSIT) under different hypoxic conditions in comparison with normoxic RSIT on cardiorespiratory fitness (CRF) and metabolic health sedentary young women. Sixty-two women (age: 21.9 ± 2.8 years, peak oxygen uptake [V̇O2peak] 25.9 4.5 ml kg−1·min−1) were randomized into one four groups, including a group (N), simulating an altitude 2500 m (H2500), incremental 2500–3400 (H2500–3400) non-exercise control (C). intervention (80 × 6 s all-out cycling sprints 9 recovery) performed three times/week for 4 weeks. Anthropometric measures, V̇O2peak, fasting blood glucose lipids assessed during follicular phase menstrual cycle before after intervention. Compared group, significant increases V̇O2peak found both groups (H2500: +8.2%, p < 0.001, d = 0.52; H2500-3400: +10.9%, 0.05, 0.99) but not N (+3.6%, > 0.21) intervention, whereas two had no difference V̇O2peak. Blood lipids, body composition remained unchanged all groups. present indicates that combining hypoxia can enhance improvement CRF compared alone population. Yet, stable hypoxia, stress short-term does additionally ameliorate CRF.
Language: Английский
Citations
9
High Altitude Medicine & Biology, Journal Year: 2022, Volume and Issue: 23(2), P. 135 - 145
Published: May 31, 2022
Kong, Zhaowei, Qian Yu, Shengyan Sun, On Kei Lei, Yu Tian, Qingde Shi, Jinlei Nie, and Martin Burtscher. The impact of sprint interval exercise in acute severe hypoxia on executive function. High Alt Med Biol. 23: 135-145, 2022. Objective: present study evaluated performance responses to normoxia relatively hypoxia. Methods: Twenty-five physically active men (age 22 ± 2 years; maximal oxygen uptake 43 ml/[kg·min]) performed four trials including two normoxic (FIO2 = 0.209) normobaric hypoxic 0.112), at rest (control) the same time different days. scheme consisted 20 sets 6-seconds all-out cycling interspersed with 15-seconds recovery. Stroop task was conducted before, 10, 30, 60 minutes after each trial, whereas peripheral saturation (SpO2), heart rate, ratings perceived exertion, feelings arousal were additionally recorded immediately interventions. Results: Despite low SpO2 levels, both resting had no adverse effects Exercise elicited improvements (-5.3% -3.4% 10 30 exercise) (-7.8% -4.3%), which is reflected by ameliorating incongruent reaction its 30-minutes sustained (p 0.018). Conclusions: findings demonstrate that caused benefits, did not impair performance.
Language: Английский
Citations
7
Biology, Journal Year: 2024, Volume and Issue: 13(10), P. 835 - 835
Published: Oct. 17, 2024
The neurocognitive response following hypoxia has received special interest. However, it is necessary to understand the impact of acute hypoxic exposure induced by simulated altitude on cognitive performance. This study aimed determine effects in healthy adults reaction time, accuracy, memory, and attention. Five electronic databases were searched. inclusion criteria were: (1) Experimental studies involving a intervention air generator performance; (2) Conducted (males and/or females; aged 18–50 years) without pathologies or health/mental problems. Four meta-analyses performed: (3) (4) Finally, 37 included meta-analysis. Hypoxia detrimental time (standard mean difference (SMD) −0.23; 95% confidence interval (CI) −0.38–−0.07; p = 0.004), accuracy (SMD −0.20; CI −0.38–−0.03; 0.02), memory −0.93; CI: −1.68–−0.17; 0.02). Nevertheless, attention was not affected during −0.06; −0.23–0.11; 0.47). Acute controlled lab conditions appears be performance, specifically memory.
Language: Английский
Citations
1