單次不同下肢阻力運動對健康成年男性脈波傳導速率與血壓之影響

Effect of Different Types of Lower Limbs Resistance Exercise on Pulse Wave Velocity and Blood Pressure in Healthy Male Adults

王群維(Chun-Wei Wang) ； 王重凱(Chung-Kai Wang) ； 王順正(Soun-Cheng Wang) ； 何承訓(Cheng-Shiun He)

《大專體育學刊》 25卷1期 (2023/03) Pp. 60-79

https://doi.org/10.5297/ser.202303_25(1).0005

摘要

等長阻力運動與等張阻力運動皆能提升使肌肉質量與肌肉力量，同時也有助於調節血壓以及動脈硬化指標－脈波傳導速率（pulse wave velocity, PWV）。先前研究中，並無比較下肢等張與等長阻力運動後PWV及血壓是否有差異。因此，本研究目的探討相同運動負荷量下，健康成年男性進行下肢等長阻力運動或等張阻力運動，觀察運動後PWV與血壓之變化是否有差異。28名健康成年男性隨機分派至等長阻力運動組（簡稱IM組）（n=14）與等張阻力運動組（簡稱IT組）（n=14），分別進行單次下肢75%最大等長自主收縮運動，以及75%一次反覆最大重量等張阻力運動。運動前（rest）、運動後立即（T0）、運動後15分鐘（T15）、30分鐘（T30）、45分鐘（T45）、60分鐘（T60）及24小時（T24H）檢測血壓與手指－腳趾脈波傳導速率（finger-toe pulse wave velocity, ftPWV）。研究結果顯示IM組與IT組在T0時間點的ftPWV皆顯著高於運動前，在T45時間點IM組顯著低於IT組，IM組在T45時間點ftPWV顯著低於運動前。此外，IM組在T45時間點的收縮壓（systolic blood pressure, SBP）與平均動脈壓（mean arterial pressure, MAP）顯著低於運動前，兩組在T0時間點的心跳率及SBP皆顯著高於運動前。本研究結論認為健康成年男性進行單次下肢等長阻力運動，在T45時間點ftPWV、SBP與MAP皆顯著下降，顯示能降低動脈硬化程度以及出現運動後低血壓現象，進而改善血管功能。

關鍵字

動脈硬化 ； 最大等長自主收縮 ； 一次反覆最大重量 ； 收縮壓 ； 平均動脈壓

並列摘要

Isometric resistance exercise (IM) and isotonic resistance exercise (IT) both can improve muscle mass and muscle strength. Moreover, resistance exercise is beneficial in regulating the blood pressure and arteriosclerosis index (pulse wave velocity, PWV). However, the influence of IM and IT trainings on PWV and blood pressure were not determined yet. Therefore, the purpose of this study was to investigate the effect of equal exercise loads of IT or IM on alterations of PWV and blood pressure in healthy male adults. Twenty-eight participants were randomly assigned into IM group (n = 14) and IT group (n = 14). Participants were performed the resistance exercise, including 75% of maximum voluntary isometric contraction and 75% of 1 repetition maximum. Blood pressure and finger-toe PWV (ftPWV) were measured at pre-exercise (rest), 0 min (T0), 15 min (T15), 30 min (T30), 45 min (T45), 60 min (T60), and 24 h (T24H) after exercise. Results showed that ftPWV values at T0 post-resistance exercise were significantly higher than those at rest in both IM and IT groups. In addition, ftPWV at T45 in IM group was significantly lower than that of IT group at T45. In the IM group, systolic blood pressure (SBP) and mean arterial pressure (MAP) at T45 were significantly lower than those at rest. Both groups had significantly increased heart rate and SBP from rest to T0 post-resistance exercise. Our findings conclude that ftPWV, SBP, and MAP were significantly reduced at T45 in healthy adults after performing lower-limb IM. Exercise in our study appears to decrease the risk of arterial stiffness and produce post-exercise hypotension to improve vascular function in adults.

並列關鍵字

arteriosclerosis ； maximal voluntary isometric contraction ； 1 repetition maximum ； systolic blood pressure ； mean arterial pressure

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