Acute Aerobic Exercise Intensity on Working Memory and Vigilance After Nap Deprivation: Effects of Low-Intensity Deserve Attention

IF 3 2区医学 Q2 CLINICAL NEUROLOGY

Nature and Science of Sleep Pub Date : 2024-09-19 DOI:10.2147/nss.s471930

Xin Guo, Ying Xu, Yao Meng, Hao Lian, Jingwen He, Ruike Zhang, Jingzhou Xu, Hao Wang, Shuyu Xu, Wenpeng Cai, Lei Xiao, Tong Su, Yunxiang Tang

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Abstract

Background: Napping deprivation in habitual nappers leads to cognitive impairment. The ameliorative effect of acute aerobic exercise has been demonstrated for this post-cognitive impairment. However, it is still unclear which intensity of aerobic exercise is the most effective and how long this improvement can be sustained.
Methods: Fifty-eight healthy adults with a chronic napping habit were randomly assigned to four intervention groups after undergoing nap deprivation: a sedentary control group, a low-intensity exercise group (50– 59% maximum heart rate, HR_max), a moderate-intensity exercise group (60– 69% HR_max), and a high-intensity exercise group (70– 79% HR_max). Working memory (N-back task), vigilance (Psychomotor Vigilance Task, PVT), and response inhibitory capacity (Go/NoGo task) were measured.
Results: Regression analyses showed a quadratic trend between exercise intensity and working memory reaction time and accuracy (F =3.297– 5.769, p < 0.05, R² =10.7– 18.9%). The effects of exercise were optimal at low-intensity. There was a significant quadratic trend between exercise intensity and PVT lapse (F =4.314, p =0.042, R² =7.2%). The effect of exercise increased with higher intensity. Prolonged observation found that the effect of low-intensity exercise on working memory was maintained for 2 hours.
Conclusion: The effect of low-intensity exercise might be underestimated. Low-intensity exercise significantly improved working memory performance, and the effects could be maintained throughout the afternoon. In contrast, the effects of high-intensity exercise were unlikely to be maintained and might even have negative effects. Future researchers can broaden the categories of participants to enhance the external validity and collect diverse physiological indicators to explore related physiological mechanisms.

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急性有氧运动强度对剥夺午睡后工作记忆和警觉性的影响：低强度运动的影响值得关注

背景：习惯性午睡者被剥夺午睡会导致认知障碍。急性有氧运动对这种后认知障碍的改善作用已得到证实。然而，目前还不清楚哪种强度的有氧运动最有效，也不清楚这种改善能持续多久：方法：58 名有长期午睡习惯的健康成年人在被剥夺午睡后被随机分配到四个干预组：静坐对照组、低强度运动组（最大心率 50- 59%，HRmax）、中等强度运动组（最大心率 60- 69%，HRmax）和高强度运动组（最大心率 70- 79%，HRmax）。对工作记忆（N-back 任务）、警觉性（精神运动警觉任务，PVT）和反应抑制能力（Go/NoGo 任务）进行了测量：回归分析表明，运动强度与工作记忆反应时间和准确性之间存在二次方趋势（F =3.297-5.769, p < 0.05, R2 =10.7- 18.9%）。低强度运动的效果最佳。运动强度与 PVT 失效之间存在明显的二次方趋势（F =4.314，p =0.042，R² =7.2%）。运动强度越大，效果越明显。长期观察发现，低强度运动对工作记忆的影响可维持 2 小时：结论：低强度运动的效果可能被低估了。结论：低强度运动的效果可能被低估了。低强度运动能明显改善工作记忆能力，而且效果能维持整个下午。相比之下，高强度运动的效果不可能保持，甚至可能产生负面影响。未来的研究人员可以扩大参与者的类别以提高外部效度，并收集不同的生理指标以探索相关的生理机制。

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来源期刊

Nature and Science of Sleep Neuroscience-Behavioral Neuroscience

CiteScore

5.70

自引率

5.90%

发文量

245

审稿时长

16 weeks

期刊介绍： Nature and Science of Sleep is an international, peer-reviewed, open access journal covering all aspects of sleep science and sleep medicine, including the neurophysiology and functions of sleep, the genetics of sleep, sleep and society, biological rhythms, dreaming, sleep disorders and therapy, and strategies to optimize healthy sleep. Specific topics covered in the journal include: The functions of sleep in humans and other animals Physiological and neurophysiological changes with sleep The genetics of sleep and sleep differences The neurotransmitters, receptors and pathways involved in controlling both sleep and wakefulness Behavioral and pharmacological interventions aimed at improving sleep, and improving wakefulness Sleep changes with development and with age Sleep and reproduction (e.g., changes across the menstrual cycle, with pregnancy and menopause) The science and nature of dreams Sleep disorders Impact of sleep and sleep disorders on health, daytime function and quality of life Sleep problems secondary to clinical disorders Interaction of society with sleep (e.g., consequences of shift work, occupational health, public health) The microbiome and sleep Chronotherapy Impact of circadian rhythms on sleep, physiology, cognition and health Mechanisms controlling circadian rhythms, centrally and peripherally Impact of circadian rhythm disruptions (including night shift work, jet lag and social jet lag) on sleep, physiology, cognition and health Behavioral and pharmacological interventions aimed at reducing adverse effects of circadian-related sleep disruption Assessment of technologies and biomarkers for measuring sleep and/or circadian rhythms Epigenetic markers of sleep or circadian disruption.