Yin Jun, Wu Hao, Yu Lan, Zhang Jing, Zhu Weili
Department of Kinesiology and Health, Capital University of Physical Education and Sports, Beijing, China.
Department of Ultrasound, China Meitan General Hospital, Beijing, China.
Int J Sports Med. 2019 Jan;40(1):3-8. doi: 10.1055/a-0753-5008. Epub 2018 Nov 20.
To examine the acute influence of pedaling cadence on arterial stiffness in young men, 15 healthy men (21.8±0.4 years) underwent 3 trials in self-control crossover design: non-cycling control (CON), cycling at 60 (RPM60) and 90 rounds per min (RPM90). Cycling lasted 30 min at intensity of 35% heart rate reserve. Arterial stiffness in cardio-ankle vascular index (CAVI) was measured at baseline (BL), immediately after (0 min) and 40 min after cycling. There were no significant CAVI changes over time in CON. CAVI in RPM60 decreased immediately after exercise and returned to baseline afterwards (6.1±0.2, 5.6±0.2 and 6.0±0.2 at BL, 0 and 40 min, respectively). RPM90 elicited significant CAVI reduction from 6.2±0.2 at BL to 5.5±0.2 at 0 min, and reverted to 5.7±0.1 at 40 min, maintaining significant difference to its baseline. There was no significant CAVI difference between RPM60 and CON, whereas CAVI in RPM90 was significantly lower than that in CON at 0 min (5.5±0.2 vs 6.1±0.2, <0.01) and 40 min (5.7±0.1 vs 6.3±0.1, <0.05). Despite equivalent exercise volume, arterial stiffness improvement induced by cycling was influenced by pedaling cadence. Higher cadence resulted in superior effect on arterial stiffness.
为研究蹬踏节奏对年轻男性动脉僵硬度的急性影响，15名健康男性（21.8±0.4岁）采用自身对照交叉设计进行了3次试验：非骑行对照（CON）、每分钟60转（RPM60）和90转（RPM90）的骑行。骑行在心率储备35%的强度下持续30分钟。在基线（BL）、骑行结束即刻（0分钟）和骑行后40分钟测量心踝血管指数（CAVI）来评估动脉僵硬度。在CON组中，CAVI随时间无显著变化。RPM60组运动后即刻CAVI下降，随后恢复至基线水平（BL、0分钟和40分钟时分别为6.1±0.2、5.6±0.2和6.0±0.2）。RPM90组使CAVI从BL时的6.2±0.2显著降低至0分钟时的5.5±0.2，并在40分钟时恢复至5.7±0.1，与基线相比仍保持显著差异。RPM60组和CON组之间CAVI无显著差异，而RPM90组在0分钟（5.5±0.2 vs 6.1±0.2，<0.01）和40分钟（5.7±0.1 vs 6.3±0.1，<0.05）时的CAVI显著低于CON组。尽管运动量相同，但骑行引起的动脉僵硬度改善受蹬踏节奏影响。更高的节奏对动脉僵硬度产生更优的效果。
