Differences in muscle O2 dynamics during treadmill exercise between aerobic capacity-matched overweight and normal-weight adults
Differences in muscle O2 dynamics during treadmill exercise between aerobic capacity-matched overweight and normal-weight adults
复制标题
有氧能力匹配的超重和正常体重成年人在跑步机运动期间肌肉氧动态的差异
DOI：
10.1007/978-3-030-34461-0_28
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发表时间：
2020
影响因子：
--
通讯作者：
Katsumura T
中科院分区：
文献类型：
--
作者：
Takagi S;Kime R;Midorikawa T;Niwayama M;Sakamoto S;Katsumura T
这项研究的目的是比较有氧能力匹配的超重和正常体重的成年人在运动过程中的肌肉o2动力学。超重女性（OW, n = 9）和正常体重女性（NW, n = 14）进行分级的跑步机运动，直到精疲力竭。采用近红外空间分辨光谱法连续监测腓肠肌肌氧饱和度（SmO2）及静息后脱氧血红蛋白浓度（∆deoxy-Hb）和总血红蛋白浓度（∆total- hb）的相对变化。与NW相比，OW组smo2显著升高，∆deoxy-Hb和∆total-Hb显著降低。肺氧摄取（VO2）以无脂质量归一化，各组间相匹配。在两组中，vo2的峰值与smo2和∆deoxy-Hb的变化显著相关。我们的研究结果表明，与有氧能力匹配的正常体重成年人相比，超重成年人的肌肉血容量和脱氧水平都较低。此外，超重成年人和正常体重成年人的肌肉o2提取量降低与vo2峰值有关。
The aim of this study was to compare muscle O2dynamics during exercise between aerobic capacity-matched overweight and normal-weight adults. Overweight women (OW, n = 9) and normal-weight women (NW, n = 14) performed graded treadmill exercise until exhaustion. Muscle O2saturation (SmO2) and relative changes from rest in deoxygenated hemoglobin concentration (∆deoxy-Hb) and total hemoglobin concentration (∆total-Hb) were monitored continuously at gastrocnemius medialis muscle by near infrared spatial resolved spectroscopy. Significantly higher SmO2and lower ∆deoxy-Hb and ∆total-Hb were observed in OW compared with NW. Pulmonary O2uptake (VO2) normalized by fat-free mass was matched between groups. In both groups, peak VO2was significantly correlated with change in SmO2and ∆deoxy-Hb. Our findings suggest that both muscle blood volume and deoxygenation were lower in overweight adults, compared to aerobic capacity-matched normal-weight adults. Moreover, lowered muscle O2extraction was related to peak VO2in overweight adults, as well as in normal-weight adults.