著者

稲田 崚佑 大家 利之 梅村 義久

出版者

中京大学スポーツ科学部

雑誌

中京大学体育学論叢 = RESEARCH JOURNAL of HEALTH and SPORT SCIENCES CHUKY OUNIVERSITY (ISSN:02887339)

巻号頁・発行日

vol.62, no.1, pp.23-32, 2022-02-22

著者

稲田 崚佑 大家 利之

出版者

一般社団法人 日本体育・スポーツ・健康学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

pp.21141, (Released:2022-04-27)

著者

小泉 潤 泉 主馬 大家 利之

出版者

一般社団法人日本体力医学会

雑誌

体力科学 (ISSN:0039906X)

巻号頁・発行日

vol.71, no.4, pp.355-365, 2022-08-01 (Released:2022-07-12)

参考文献数

32

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It has been suggested that inspiratory muscles fatigue impairing blood flow to the active limb muscle via respiratory muscle metaboreflex. The purpose of this study was to investigate the effects of inspiratory muscle fatigue on exercise performance and muscle tissue oxygenation in high-intensity exercise takes about 3.5~5min. Eleven healthy males subjects performed two conditions of constant-load exercise to exhaustion (TTE) on a cycle ergometer at 100% of maximal oxygen uptake. The two conditions—inspiratory muscle fatiguing (IMF) and non-fatiguing (PLA) —which had different intensity inspiratory resistance breathing (IRB) were performed before exercise. Muscle tissue oxygenations were measured by deoxyhemogrobin (HHb), oxygen saturation index (StO2) from right vastus lateralis during TTE. All data were analyzed from nine subjects whose inspiratory muscle were fatigued by IRB in IMF. Results: TTE was significantly shorter in IMF compare to PLA (244±31s vs. 268±38s, p<0.05). HHb was significantly higher and StO2 was significantly lower in IMF than in PLA (p<0.05). Conclusion: High-intensity exercise completed in 3.5~5 minutes, it was suggested that inspiratory muscle fatigue reduced the oxygen deriver to active limb muscle, resulting in decrease exercise performance. Improving function of inspiratory muscles, such as in inspiratory muscle training, may improve oxygenation of the active limb muscle and enhance exercise performance.

著者

小泉 潤 荒牧 勇 大家 利之

雑誌

中京大学体育学論叢 = RESEARCH JOURNAL of HEALTH and SPORT SCIENCES CHUKYO UNIVERSITY

巻号頁・発行日

vol.60, pp.1-7, 2020-03-01

著者

大家 利之 荒牧 勇 北川 薫

出版者

一般社団法人 日本体育学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

pp.12060, (Released:2013-07-08)

参考文献数

22

被引用文献数

1

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Purpose: Recovery condition is classified into two major categories during short-duration (<6 s) intermittent sprint exercise: active recovery (AR) and passive recovery (PR). Performance in passive trials is superior to active trials during short-duration intermittent sprint exercise. The effect of AR intensity on performance during short-duration intermittent sprint exercise remains unclear. The purpose of this study was to compare the effect of recovery conditions (active vs. passive) and exercise intensity of the recovery period on performance, as well as muscle oxygenation during short-duration intermittent exercise. Methods: Ten subjects performed a graded test and ten 5-s maximal sprints with 25 s of PR or AR between sprints on a cycle ergometer. Exercise intensity of AR was adjusted to 15% (AR15), 25% (AR25), or 40% (AR40) of maximal oxygen uptake (VO2max), and these were randomly assigned. Peak power and percentage decrement in power were determined during the intermittent sprint exercise. Oxyhemoglobin (O2Hb) and deoxyhemoglobin were also measured using near-infrared spectroscopy. Results: Peak power values were significantly higher with PR than with AR40 (P<0.05). The percentage of peak power decrement was significantly lower with PR than with AR40 (8.4±2.9% vs. 10.9±3.6%, P<0.05). O2Hb variation was significantly higher with PR than with AR40 (27.9±9.6% vs. 20.6±6.0%, P<0.05). Conclusion: AR40 is associated with reduced sprint performance and lower muscular reoxygenation. Performance with AR is not inferior compared with PR if AR is less than 25% of VO2max during short-duration intermittent exercise.