分级缺氧中中等强度心率夹紧骑行时的运动感觉:一种定性方法。

IF 3.5 2区 医学 Q1 PHYSIOLOGY
Siu Nam Li, Peter Peeling, Timothy Budden, Aaron Simpson, Brendan R Scott, Jeremiah J Peiffer, Alex Shaykevich, Olivier Girard
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引用次数: 0

摘要

目的:用定性方法探讨分级缺氧对心率(HR)骑行过程中知觉感觉的影响。方法:16名训练有素的男性分别进行60分钟的循环,在模拟海拔2500米、3000米、3500米和4000米的正常缺氧条件下,他们的HR被固定在第一次通气阈值的80%。每次训练结束后,进行一次~ 10分钟的结构化访谈,以了解参与者在每种条件下对锻炼的看法。对采访记录进行关键主题分析,并以笔录的形式呈现。结果:在海拔4000米时,5名受试者感到头晕,2名受试者感到注意力不集中,这是在海拔较低时所没有的。呼吸困难随着缺氧严重程度的增加而逐渐增加,从1例常氧报告到4000米时的9例。在所有情况下,肢体不适都是一致的。结论:尽管在hr夹紧循环期间有类似的生理反应,但缺氧严重程度影响了选定的感知感觉(即难以集中注意力、呼吸困难和头晕)。在为hr夹紧循环选择所需的缺氧严重程度时应考虑这些影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exercise Sensations During Moderate-Intensity Heart-Rate-Clamped Cycling in Graded Hypoxia: A Qualitative Approach.

Purpose: To explore how graded hypoxia affects perceptual sensations during heart-rate (HR) -clamped cycling using qualitative methods.

Methods: Sixteen trained males cycled for 60 minutes on separate visits, with their HR clamped at 80% of their first ventilatory threshold across simulated altitudes of 2500 m, 3000 m, 3500 m, and 4000 m and in normoxia. After each session, an ∼10-minute structured interview was conducted to gather insights into participants' perceptions of the exercise under each condition. Interview transcripts were analyzed for key themes, which were presented in a pen profile.

Results: At 4000 m, 5 participants perceived light-headedness and 2 had difficulty focusing, which were not experienced at lower altitudes. Difficulty breathing increased progressively with hypoxic severity, from 1 report in normoxia to 9 at 4000 m. Limb discomfort was consistently reported across all conditions.

Conclusion: Despite comparable physiological responses during HR-clamped cycling, hypoxia severity influenced selected perceived sensations (ie, difficulty focusing, difficulty breathing, and light-headedness). These effects should be considered when selecting the desired hypoxic severity for HR-clamped cycling.

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来源期刊
CiteScore
5.80
自引率
12.10%
发文量
199
审稿时长
6-12 weeks
期刊介绍: The International Journal of Sports Physiology and Performance (IJSPP) focuses on sport physiology and performance and is dedicated to advancing the knowledge of sport and exercise physiologists, sport-performance researchers, and other sport scientists. The journal publishes authoritative peer-reviewed research in sport physiology and related disciplines, with an emphasis on work having direct practical applications in enhancing sport performance in sport physiology and related disciplines. IJSPP publishes 10 issues per year: January, February, March, April, May, July, August, September, October, and November.
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