Osaka Kyoiku University Researcher Information
日本語 | English
研究者業績
基本情報
- 所属
- 大阪教育大学 表現活動教育系 准教授
- 学位
- 修士(体育学)(筑波大学)博士(体育科学)(筑波大学)
- J-GLOBAL ID
- 200901042206867275
- researchmap会員ID
- 5000082154
研究キーワード
10経歴
11-
2013年4月 - 現在
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2009年4月 - 2013年3月
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2008年4月 - 2009年3月
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2006年4月 - 2007年3月
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2006年 - 2007年
学歴
6-
2005年4月 - 2008年3月
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- 2007年3月
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2001年4月 - 2003年3月
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- 2003年3月
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1997年4月 - 2001年3月
受賞
1-
2007年3月
論文
25-
Scientific Reports 12(1) 2022年12月24日 査読有り筆頭著者責任著者Abstract We aimed to determine the effects of wearing a cloth face mask on cardiorespiratory response, peak oxygen uptake (Vo2), respiratory muscle effort, and exercise tolerance during incremental exercise. The study had a randomized crossover design: 11 apparently healthy young men performed the Bruce protocol treadmill test in two conditions, wearing a cloth face mask (CFM) and without CFM (CON), in random order. Minute ventilation and oxygen uptake were measured using a mass spectrometry metabolic analyzer; cardiac output (CO) was measured using an impedance CO monitor; and mouth pressure (Pm) was measured and calculated as an integral Pm to assess respiratory muscle effort. Maximal minute ventilation was 13.4 ± 10.7% lower in the CFM condition than in the CON condition (P < 0.001). The peak Vo2 (52.4 ± 5.6 and 55.0 ± 5.1 mL/kg/min in CFM and CON, respectively) and CO were not significantly different between the two conditions. However, the integral value of Pm was significantly higher (P = 0.02), and the running time to exhaustion was 2.6 ± 3.2% lower (P = 0.02) in the CFM condition than in the CON condition. Our results suggest that wearing a cloth face mask increased respiratory muscle effort and decreased ventilatory volume in healthy young men; however, Vo2 remained unchanged. Exercise tolerance also decreased slightly.
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High altitude medicine & biology 23(2) 125-134 2022年6月 査読有りCao, Yinhang, Naoto Fujii, Tomomi Fujimoto, Yin-Feng Lai, Takeshi Ogawa, Tsutomu Hiroyama, Yasushi Enomoto, and Takeshi Nishiyasu. CO2-enriched air inhalation modulates the ventilatory and metabolic responses of endurance runners during incremental running in hypobaric hypoxia. High Alt Med Biol. 23:125-134, 2022. Aim: We measured the effects of breathing CO2-enriched air on ventilatory and metabolic responses during incremental running exercise under moderately hypobairc hypoxic (HH) conditions. Materials and Methods: Ten young male endurance runners [61.4 ± 6.0 ml/(min·kg)] performed incremental running tests under three conditions: (1) normobaric normoxia (NN), (2) HH (2,500 m), and (3) HH with 5% CO2 inhalation (HH+CO2). The test under NN was always performed first, and then, the two remaining tests were completed in random and counterbalanced order. Results: End-tidal CO2 partial pressure (55 ± 3 vs. 35 ± 1 mmHg), peak ventilation (163 ± 14 vs. 152 ± 12 l/min), and peak oxygen uptake [52.3 ± 5.5 vs. 50.5 ± 4.9 ml/(min·kg)] were all higher in the HH+CO2 than HH trial (all p < 0.01), respectively. However, the duration of the incremental test did not differ between HH+CO2 and HH trials. Conclusion: These data suggest that chemoreflex activation by breathing CO2-enriched air stimulates breathing and aerobic metabolism during maximal intensity exercise without affecting exercise performance in male endurance runners under a moderately hypobaric hypoxic environment.
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大阪教育大学紀要. 人文社会科学・自然科学 70 99-108 2022年2月28日 査読有り責任著者type:Article 本研究は,運動強度や時間,負荷が一定である運動と全力で行う運動の発揮様式の違いによって短時間自転車運動時の機械効率が異なるかを明らかにすることを目的とした.15名の大学陸上競技部に所属し,短距離走および中距離走を専門とする男子大学生が実験に参加した.実験は,事前テストとして,自転車エルゴメーターを用いた漸増負荷運動を行い,最大酸素摂取量(VO2max)および最大下強度における酸素需要量を測定した.別日にそれぞれ,30秒間の全力自転車運動(Wingate test), 120%, 150%, 180%VO2max強度での30秒間の一定負荷運動,および120%VO2max強度での疲労困憊に至るまでの一定負荷運動テストの5つの超最大運動を行った.このとき,酸素摂取量および酸素借を算出し,代謝量に対する仕事量を機械効率として算出した.その結果,3つの強度における一定負荷運動およびWingate testの機械効率には有意な差は見られなかった.しかしながら,疲労困憊までの120%VO2max一定負荷運動時の機械効率は他の運動と比べて有意に低値を示した(p<0.05).以上の結果より,超最大運動での機械効率は,運動継続時間が同じときには運動強度や発揮様式に関わらず一定であるが,運動継続時間に影響を受けることが示唆された. The purpose of this study was to investigate whether the mechanical efficiency (ME) during supra-maximal cycling exercise differs by the difference in exercise intensity, duration and cadence influence. Fifteen college students who belong to a university track and field team performed five supra-maximal exercise tests. The sprint cycling tests were 1) the constant load exhaustive cycling with 120% maximal oxygen uptake (VO2max) pedaling load (MAOD test), the 30- s Wingate test, and three kinds of 30-s sub-maximal sprint cycling with 120, 150, and 180%VO2max pedaling load. The ME was calculated as the amount of work divided by energy supply calculated from VO2 and oxygen deficit. As a result, the ME during the 30-s submaximal sprint cycling test was unchanged regardless of the exercise intensity. It was similar even in the Wingate test, where the power output was not constant. In contrast, the ME of the MAOD test was significantly lower than other sprint cycling tests. Therefore, exercise duration was affected by ME during the sprint cycling exercise, but the ME was constant regardless of exercise intensity and cadence.
MISC
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日本体育・スポーツ・健康学会予稿集 71 161 2021年【緒言】短時間運動時の血中乳酸濃度(BLa)当たりの走速度をスプリントエコノミー(SE)として評価する試みがなされている。しかしながら、BLaは無酸素代謝量を定量できない。本研究は、酸素借(AOD)を用いてSEを算出し、短時間運動パフォーマンスとの関係を検討することを目的とした。【方法】対象者は体育会陸上競技部に所属する男子大学生15名(100m:4名、400m:5名、800m:6名)であった。自転車エルゴメーターを用いて、①最大下負荷テストおよび疲労困憊までの漸増負荷運動テスト、②最大酸素借(MAOD)テスト、③3強度で30秒間のスプリントテスト(120%VO2max、150%VO2max、180%VO2max)を行った。また、短時間運動パフォーマンスを評価するために30秒間のWingateテストを行った。SEは3強度のスプリントテストにおける仕事率に対してAODをプロットし、その傾きの逆数とした。SEの高さによって対象者をhigh群とlow群に分けた。高いSEは、運動強度が上がっても、より少ない無酸素代謝量で運動を行うことができることを意味する。【結果】high群はlow群よりもWingateテスト中の平均パワーが有意に高かった(p<0.05)。また、MAODはhigh群とlow群との間に差はなかったものの、VO2maxはhigh群でlow群よりも有意に低かった。対象者の専門種目間で検討したところ、SEは、400m、100m、800mの順に高値を示したことから、種目特性によってSEが異なることが示唆された。【結論】AODによって評価されたSEは、短時間運動パフォーマンスの高さと関係することが示唆された。また、SEは有酸素および無酸素能力の高さによって決定されるものではないことが示唆された。SEを用いて種目適正の判断やスプリントパフォーマンスの評価ができる可能性がある。
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日本体育学会大会予稿集 69 128_3-128_3 2018年本研究は陸上短距離選手における運動強度評価を、簡易スケールを用いてトレーニングインパルス(TRIMP)を算出し、パフォーマンス変動との関連を検討することを目的とした。対象者は大学陸上短距離選手9名であった。運動強度の記録はトレーニング内容から選択するスケールから評価し、運動強度と運動時間の積をTRIMPとして算出し、TRIMPを標準偏差で除した値を単調性として、単調性とTRIMPの積をStrengthとして算出した。また、体調の指標として起床時心拍および体温を記録した。その結果、自己記録更時とそうでない時のTRIMPの変動ににおけるTRIMPsおよびStrengthは、2か月前から試合月に向けて低下する傾向にあった。ケガ発生との関連を見たところ、ケガ発生者ではケガが発生しなかった者と比較して、単調性およびStrengthが急激に増加する傾向を示した。また、TRIMPの変動から競技記録予測を行ったところ、実際の記録との間に有意な正の相関関係が見られ、算出式の係数および時定数は先行研究と一致し、本研究のトレーニング定量モデルの妥当性が示唆された。
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MEDICINE AND SCIENCE IN SPORTS AND EXERCISE 40(5) S170-S170 2008年5月
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MEDICINE AND SCIENCE IN SPORTS AND EXERCISE 40(5) S189-S189 2008年5月
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EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY 99(1) 39-46 2007年1月The purpose of this study was to determine whether the metabolic response and running performance during intermittent graded sprint running were affected by moderate hypobaric hypoxia (H; 2,500 m above sea level) in competitive middle-distance runners. Nine male runners performed intermittent graded sprint running until exhaustion, to evaluate the metabolic response and running performance in H and normobaric normoxia (N). The test constructed of incremental (25 m min(-1)) 20 s running bouts (4 degrees inclination) interspaced with 100 s recovery periods. Maximal running speed was not different: between conditions [453 (7) m min(-1) vs. 458 (4) m min(-1) in N vs. H]. V-O2 at each speed was lower in H than N (ANOVA; P < 0.05). Although, oxygen deficit (D-O2) at each speed was not different between N and H (ANOVA; P = 0.1), total accumulated D-O2 in all bouts was significantly higher in H than N [165 (10) ml kg(-1) in N and 173 (10) ml kg(-1) in H]. The ratio of D-O2-V-O2(-1) was similar in all bouts, but higher in H than N. These results suggest that intermittent graded sprint running performance is not affected by moderate hypobaria despite a reduction in the energy supplied by aerobic metabolism due to a compensatory increase in the energy supplied by the anaerobic metabolism in competitive middle-distance runners.
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European journal of applied physiology 99(1) 39-46 2007年1月The purpose of this study was to determine whether the metabolic response and running performance during intermittent graded sprint running were affected by moderate hypobaric hypoxia (H; 2,500 m above sea level) in competitive middle-distance runners. Nine male runners performed intermittent graded sprint running until exhaustion, to evaluate the metabolic response and running performance in H and normobaric normoxia (N). The test constructed of incremental (25 m min(-1)) 20 s running bouts (4 degrees inclination) interspaced with 100 s recovery periods. Maximal running speed was not different: between conditions [453 (7) m min(-1) vs. 458 (4) m min(-1) in N vs. H]. V-O2 at each speed was lower in H than N (ANOVA; P < 0.05). Although, oxygen deficit (D-O2) at each speed was not different between N and H (ANOVA; P = 0.1), total accumulated D-O2 in all bouts was significantly higher in H than N [165 (10) ml kg(-1) in N and 173 (10) ml kg(-1) in H]. The ratio of D-O2-V-O2(-1) was similar in all bouts, but higher in H than N. These results suggest that intermittent graded sprint running performance is not affected by moderate hypobaria despite a reduction in the energy supplied by aerobic metabolism due to a compensatory increase in the energy supplied by the anaerobic metabolism in competitive middle-distance runners.
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体力科學 55(6) 756 2006年12月
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JOURNAL OF APPLIED PHYSIOLOGY 100(2) 414-420 2006年2月We examined whether an increase in skin temperature or the rate of increase in core body temperature influences the relationship between minute ventilation (V.E) and core temperature during prolonged exercise in the heat. Thirteen subjects exercised for 60 min on a cycle ergometer at 50% of peak oxygen uptake while wearing a suit perfused with water at 10 degrees C (T10), 35 degrees C (T35), or 45 degrees C (T45). During the exercise, esophageal temperature (Tes), skin temperature, heart rate (HR), V. E, tidal volume, respiratory frequency (f), respiratory gases, blood pressure ( BP), and blood lactate were all measured. We found that oxygen uptake, carbon dioxide output, BP, and blood lactate did not differ among the sessions. Tes, HR, V. E, and f remained nearly constant from minute 10 onward in the T10 session, but all of these parameters progressively increased in the T35 and T45 sessions, and significantly higher levels were seen in the T45 than the T35 session. For all but two subjects in the T35 and T45 sessions, plotting V. E as a function of Tes revealed no threshold for hyperventilation; instead, increases in V. E were linearly related to Tes, and there were no significant differences in the slopes or intercepts between the T35 and T45 sessions. Thus, during prolonged submaximal exercise in the heat, V. E increases with core temperature, and the influences of skin temperature and the rate of increase in Tes on the relationship between V. E and Tes are apparently small.
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JOURNAL OF APPLIED PHYSIOLOGY 100(2) 414-420 2006年2月We examined whether an increase in skin temperature or the rate of increase in core body temperature influences the relationship between minute ventilation (V.E) and core temperature during prolonged exercise in the heat. Thirteen subjects exercised for 60 min on a cycle ergometer at 50% of peak oxygen uptake while wearing a suit perfused with water at 10 degrees C (T10), 35 degrees C (T35), or 45 degrees C (T45). During the exercise, esophageal temperature (Tes), skin temperature, heart rate (HR), V. E, tidal volume, respiratory frequency (f), respiratory gases, blood pressure ( BP), and blood lactate were all measured. We found that oxygen uptake, carbon dioxide output, BP, and blood lactate did not differ among the sessions. Tes, HR, V. E, and f remained nearly constant from minute 10 onward in the T10 session, but all of these parameters progressively increased in the T35 and T45 sessions, and significantly higher levels were seen in the T45 than the T35 session. For all but two subjects in the T35 and T45 sessions, plotting V. E as a function of Tes revealed no threshold for hyperventilation; instead, increases in V. E were linearly related to Tes, and there were no significant differences in the slopes or intercepts between the T35 and T45 sessions. Thus, during prolonged submaximal exercise in the heat, V. E increases with core temperature, and the influences of skin temperature and the rate of increase in Tes on the relationship between V. E and Tes are apparently small.
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日本体育学会大会予稿集 (56) 245 2005年11月
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EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY 94(3) 254-261 2005年6月This study investigated whether in trained middle-distance runners, intermittent short-term graded running performance is affected by a hypobaric hypoxic environment (simulated 2,500 m) (H). Seven male middle-distance runners performed an aerobic performance test and an intermittent short-term graded anaerobic running-performance test (MART) both in H and in a normobaric normoxic environment (N). VO2max and OBLA were markedly lower (by 18.1% and 8.7%, respectively) in H than in N. In MART, neither maximal running velocity (V-max) nor exhaustion-time was different between N and H (454 (7) m min(-1) vs. 451 (6) m min(-1), respectively, and 208.7 (5.2) s vs. 205.7 (4.2) s, respectively). The blood lactate concentration at sub-maximal running speed (425m min(-1)) was significantly greater in H than in N (paired t-test: P< 0.05). These results suggest that, in trained middle-distance runners, intermittent short-term graded running performance is not affected by H, despite a considerable decrease in aerobic power in H during the aerobic performance test.
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European journal of applied physiology 94(3) 254-61 2005年6月This study investigated whether in trained middle-distance runners, intermittent short-term graded running performance is affected by a hypobaric hypoxic environment (simulated 2,500 m) (H). Seven male middle-distance runners performed an aerobic performance test and an intermittent short-term graded anaerobic running-performance test (MART) both in H and in a normobaric normoxic environment (N). VO2max and OBLA were markedly lower (by 18.1% and 8.7%, respectively) in H than in N. In MART, neither maximal running velocity (V-max) nor exhaustion-time was different between N and H (454 (7) m min(-1) vs. 451 (6) m min(-1), respectively, and 208.7 (5.2) s vs. 205.7 (4.2) s, respectively). The blood lactate concentration at sub-maximal running speed (425m min(-1)) was significantly greater in H than in N (paired t-test: P< 0.05). These results suggest that, in trained middle-distance runners, intermittent short-term graded running performance is not affected by H, despite a considerable decrease in aerobic power in H during the aerobic performance test.
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MEDICINE AND SCIENCE IN SPORTS AND EXERCISE 37 S167-S167 2005年5月
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AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY 287(5) H2147-H2153 2004年11月We tested the hypothesis that orthostatic stress would modulate the arterial baroreflex (ABR)mediated beat-by-beat control of muscle sympathetic nerve activity (MSNA) in humans. In 12 healthy subjects, ABR control of MSNA ( burst incidence, burst strength, and total activity) was evaluated by analysis of the relation between beat-by-beat spontaneous variations in diastolic blood pressure (DAP) and MSNA during supine rest ( CON) and at two levels of lower body negative pressure ( LBNP: - 15 and - 35 mmHg). At - 15 mmHg LBNP, the relation between burst incidence ( bursts per 100 heartbeats) and DAP showed an upward shift from that observed during CON, but the further shift seen at - 35 mmHg LBNP was only marginal. The relation between burst strength and DAP was shifted upward at - 15 mmHg LBNP ( vs. CON) and further shifted upward at - 35 mmHg LBNP. At - 15 mmHg LBNP, the relation between total activity and DAP was shifted upward from that obtained during CON and further shifted upward at - 35 mmHg LBNP. These results suggest that ABR control of MSNA is modulated during orthostatic stress and that the modulation is different between a mild (nonhypotensive) and a moderate ( hypotensive) level of orthostatic stress.
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AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY 287(5) H2147-H2153 2004年11月We tested the hypothesis that orthostatic stress would modulate the arterial baroreflex (ABR)mediated beat-by-beat control of muscle sympathetic nerve activity (MSNA) in humans. In 12 healthy subjects, ABR control of MSNA ( burst incidence, burst strength, and total activity) was evaluated by analysis of the relation between beat-by-beat spontaneous variations in diastolic blood pressure (DAP) and MSNA during supine rest ( CON) and at two levels of lower body negative pressure ( LBNP: - 15 and - 35 mmHg). At - 15 mmHg LBNP, the relation between burst incidence ( bursts per 100 heartbeats) and DAP showed an upward shift from that observed during CON, but the further shift seen at - 35 mmHg LBNP was only marginal. The relation between burst strength and DAP was shifted upward at - 15 mmHg LBNP ( vs. CON) and further shifted upward at - 35 mmHg LBNP. At - 15 mmHg LBNP, the relation between total activity and DAP was shifted upward from that obtained during CON and further shifted upward at - 35 mmHg LBNP. These results suggest that ABR control of MSNA is modulated during orthostatic stress and that the modulation is different between a mild (nonhypotensive) and a moderate ( hypotensive) level of orthostatic stress.
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EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY 92(4-5) 414-420 2004年8月We investigated the effects of brief leg cooling after moderate exercise on the cardiorespiratory responses to subsequent exercise in the heat. Following 40 min of ergometer cycling [65% peak oxygen uptake (.O-2peak)] at 35degreesC (Ex. 1), seven male subjects [21.9 (1.1) years of age; 170.9 (1.9) cm height; 66.0 (2.0) kg body mass; 46.7 (2.0) ml kg(-1) min(-1) .O-2peak] immersed their legs in 35degreesC (control condition, CONT) or 20degreesC (cooling condition, COOL) water for 5 min and then repeated the cycling (as before, but for 10 min) (Ex. 2). Just before Ex. 2, esophageal temperature (T-es) was lower in COOL than in CONT [36.9 (0.2) vs 37.5 (0.1)degreesC] (P<0.01), as also were both mean skin temperature [33.9 (0.2) vs 35.2 (0.2)degreesC] (P<0.01), and heart rate (HR) [93.2 (6.0) vs 102.7 (4.9) beats min(-1)] (P<0.05). During Ex. 2, no differences between CONT and COOL were observed in oxygen uptake, arterial blood pressure, blood lactate concentration, or ratings of perceived exertion; however, T-es, skin temperature, and HR were lower in COOL than in CONT. Further, during the first 5 min of Ex. 2, minute ventilation was significantly lower in COOL than in CONT [50.3 (2.0) vs 53.4 (2.6) l min(-1)] (P<0.01). These results suggest that brief leg cooling during the recovery period may be effective at reducing thermal and cardiorespiratory strain during subsequent exercise in the heat.
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EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY 92(4-5) 414-420 2004年8月We investigated the effects of brief leg cooling after moderate exercise on the cardiorespiratory responses to subsequent exercise in the heat. Following 40 min of ergometer cycling [65% peak oxygen uptake (.O-2peak)] at 35degreesC (Ex. 1), seven male subjects [21.9 (1.1) years of age; 170.9 (1.9) cm height; 66.0 (2.0) kg body mass; 46.7 (2.0) ml kg(-1) min(-1) .O-2peak] immersed their legs in 35degreesC (control condition, CONT) or 20degreesC (cooling condition, COOL) water for 5 min and then repeated the cycling (as before, but for 10 min) (Ex. 2). Just before Ex. 2, esophageal temperature (T-es) was lower in COOL than in CONT [36.9 (0.2) vs 37.5 (0.1)degreesC] (P<0.01), as also were both mean skin temperature [33.9 (0.2) vs 35.2 (0.2)degreesC] (P<0.01), and heart rate (HR) [93.2 (6.0) vs 102.7 (4.9) beats min(-1)] (P<0.05). During Ex. 2, no differences between CONT and COOL were observed in oxygen uptake, arterial blood pressure, blood lactate concentration, or ratings of perceived exertion; however, T-es, skin temperature, and HR were lower in COOL than in CONT. Further, during the first 5 min of Ex. 2, minute ventilation was significantly lower in COOL than in CONT [50.3 (2.0) vs 53.4 (2.6) l min(-1)] (P<0.01). These results suggest that brief leg cooling during the recovery period may be effective at reducing thermal and cardiorespiratory strain during subsequent exercise in the heat.
書籍等出版物
1講演・口頭発表等
5所属学協会
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