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UM E-Theses Collection (澳門大學電子學位論文庫)

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Title

急性高強度間歇運動對青年男子運動員心電 QTc 及血壓影響

English Abstract

Research purpose: A growing body of evidence demonstrates that low volume of high-intensity interval training can serve as effective alternates to traditional time-consuming training, inducing similar or even superior physiological adaptations. However, the extreme high intensity used in this kind of training has raised concerns about the cardiovascular risk of such exercise. The purpose of this study was to compare the acute QTc (prolonged QTc represents an increase in risk of untoward cardiovascular events) and blood pressure (BP) responses to four different single bouts of high intensity interval exercise (HIIE), matched for exercise time, in young male athletes. Research methods: Subjects were 13 male endurance (E) and 15 male team sports (T) young athletes with regular training. Subjects performed 4 different randomly ordered single HIIE sessions (all-out cycling sprint 6 sec ×20 [T] or 40 [E], interspersed with 15 sec [6-15s], 30 sec [6-30s], 60 sec [6-60s] of rest and all-out cycling sprint 30 sec × 4 [T] or 8 [E], interspersed with 4 min of rest [30-4m], pure exercise was 120 sec [T] or 240 sec [E] for four protocols) with measurement of QTc during recovery period after each sprint. Further, BP was examined before and after each exercise. Research results: Compared to pre-exercise, QTc was significantly prolonged during and following exercise (400-420 vs. 470-520ms), with the most lowest change in 6-15s for two group, and most pronounced changes in the 6-30s for E and 6-60s for T. Further, all HIIE protocols resulted in slight elevation in systolic blood IV pressure (SBP) with most pronounced changes in the 6-15s (~160 mmHg), with no change in diastolic blood pressure (DBP), followed by reduction in SBP and DBP during recovey period after HIIE. Conclusion: When considering reduced cardiac irregularity, the HIIE protocol with short sprint (6 sec) and short recovery (15 sec) to be optimal. Longer recovery in HIIE may result in an increase in risk of untoward cardiovascular events. Further, HIIE resulted in similar BP responses with slight elevation in SBP.

Chinese Abstract

研究目的:最近研究顯示,低運動量的高強度間歇訓練較傳統中等強度連續訓 練形式鍛煉效果相當或者更為有效。然而,由於前者使用極高運動強度,人們 擔心是否會增加運動中心臟事件的危險性。本研究觀察男子青年運動員進行四 種高強度間歇運動時的心電圖 QTc(其延長反映心電傳導不穩定性增加)和血 壓反應,以比較不同高強度間歇訓練方案運動中心臟事件的危險性。 研究方法:受試者為從事規律訓練的 13 名耐力(E)和 15 名團隊項目(T)男 子運動員,按照隨機順序進行了 4 次高強度間歇運動(全力踏車衝刺 6 秒 ×20 次 [T],40 次 [E],間歇 15 秒 [方案:6-15s],30 秒[方案:6-30s],60 秒 [方 案:6-60s] 和 30 秒 ×4 次 [T],8 次 [E],間歇 4 分鐘 [方案:30-4m],四種 方案的純運動時間為 120 秒 [T]及 240 秒 [E])。測定運動過程中每次衝刺後恢 復期和整個運動結束後 QTc 以及運動前後血壓。 研究結果:與運動前相比,運動中及運動後 QTc 顯著延長(400-420 vs. 470-520 ms),其中 6-15s 在兩組運動員延長幅度最小,而延長最多的在 E 發生在 6-30s, 在 T 發生在 6-60s。運動引起收縮壓小幅增加,其中 6-15s 升幅最大至 160 毫米 汞柱左右,而舒張壓無顯著變化。運動結束後恢復期收縮壓及舒張壓均降低。 研究結論:從心電穩定性角度評價,短衝刺且短間歇的高強度間歇運動方案 (6-15s)對青年男子運動員是最優的,如運動方案中延長運動中衝刺後恢復期, 運動中心電的不穩定性會增加。另外,高強度間歇運動的血壓升高反應的幅度 似乎並不大。

Issue date

2016

Author

馮業騰

Faculty

Faculty of Education

Degree

M.Ed.

Subject

Exercise -- Health aspects

體育鍛鍊 -- 健康方面

Exercise -- Physiological aspects

體育鍛鍊 -- 生理方面

Electrocardiography

心電圖

Supervisor

孔兆偉

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Location
1/F Zone C
Library URL
991001981069706306