Aging affects spatial distribution of leg muscle oxygen saturation during ramp cycling exercise.
Aging affects spatial distribution of leg muscle oxygen saturation during ramp cycling exercise.
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DOI：
10.1007/978-1-4614-7411-1_22
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发表时间：
2013
影响因子：
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通讯作者：
Shun Takagi;R. Kime;N. Murase;Tsubasa Watanabe;T. Osada;M. Niwayama;T. Katsumura
中科院分区：
文献类型：
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作者：
Shun Takagi;R. Kime;N. Murase;Tsubasa Watanabe;T. Osada;M. Niwayama;T. Katsumura
我们比较了老年男性（n= 8;年龄，65 ± 3岁; ELD）和年轻男性（n= 10;年龄，23 ± 3岁; YNG）在坡道自行车运动中几条腿部肌肉和单个肌肉的肌氧饱和度（SmO 2）反应。通过近红外空间分辨光谱法监测股外侧肌（VLd）远端部位、股外侧肌（VLp）近端部位、股直肌（RF）、股内侧肌（VM）、股二头肌（BF）、腓肠肌外侧肌（GL）、腓肠肌内侧肌（GM）和胫骨前肌（TA）的SmO 2。在亚极量运动中，在给定的绝对功率下，观察到ELD的VLd、RF、BF、GL和TA的SmO 2显著低于YNG，但VLp、VM和GM的SmO 2不显著低于YNG。相比之下，在所有测量部位，运动峰值时的SmO 2在组间没有显着差异。这些结果表明，年龄对SmO 2反应的影响是异质性之间的腿肌肉，也在一个单一的肌肉。老年男性SmO 2较低可能是由于肌肉血流量减少或血流分布改变所致。
We compared muscle oxygen saturation (SmO2) responses in several leg muscles and within a single muscle during ramp cycling exercise between elderly men (n= 8; age, 65 ± 3 years; ELD) and young men (n= 10; age, 23 ± 3 years; YNG). SmO2was monitored at the distal site of the vastus lateralis (VLd), proximal site of the vastus lateralis (VLp), rectus femoris (RF), vastus medialis (VM), biceps femoris (BF), gastrocnemius lateralis (GL), gastrocnemius medialis (GM), and tibialis anterior (TA) by near-infrared spatial resolved spectroscopy. During submaximal exercise, significantly lower SmO2at a given absolute work rate was observed in VLd, RF, BF, GL, and TA but not in VLp, VM, and GM in ELD than in YNG. In contrast, at all measurement sites, SmO2at peak exercise was not significantly different between groups. These results indicate that the effects of aging on SmO2responses are heterogeneous between leg muscles and also within a single muscle. The lower SmO2in older men may have been caused by reduced muscle blood flow or altered blood flow distribution.