Gender differences in muscle blood volume reduction in the tibialis anterior muscle during passive plantarflexion.
Gender differences in muscle blood volume reduction in the tibialis anterior muscle during passive plantarflexion.
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被动跖屈期间胫骨前肌肌肉血量减少的性别差异。
DOI：
10.1111/cpf.12232
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发表时间：
2015
影响因子：
1.8
通讯作者：
Kuno-Mizumura M.
中科院分区：
文献类型：
--
作者：
Otsuki A;Muraoka Y;Fujita E;Kubo S;Yoshida M;Komuro Y;Ikegawa S;Ohta Y;Kuno-Mizumura M.
身体灵活性，如关节活动范围和肌肉伸展，可能会影响肌肉血容量。事实证明，妇女的灵活性比男子大。我们研究了在未经训练的男性和女性中，肌束长度和肌肉血容量或氧合之间的关系是否存在性别差异。在16名未经培训的男性和13名未经培训的女性中，我们用近红外光谱法校准基线和动脉闭塞脱氧水平后，测量了总[血红蛋白（Hb）+肌红蛋白（Mb）]（总[Hb + Mb]）和相对氧[Hb + Mb]。此外，在被动跖屈期间，使用B模式超声检查测量胫骨前肌的肌束长度。在140°和160°跖屈和最大角度无疼痛时，女性的肌束长度较基线（踝关节角度120°，由腓骨头、踝（枢轴）和第五跖骨远端骺组成）的增加大于男性。然而，在任何跖屈度下，女性和男性的总[Hb + Mb]和相对氧[Hb + Mb]较基线的降低均无差异。此外，肌束长度和总[Hb + Mb]/肌肉厚度（男性>女性）显示出类似的关系，肌肉厚度增加毛细血管压缩。这些研究结果表明，在肌肉拉伸过程中，肌肉血容量的机械功能的可能性，这是女性比男性更大。
Physical flexibility, such as joint range of motion and muscle extension, may influence muscle blood volume. Women have been shown to have a greater degree of flexibility than men. We examined whether there is a gender difference in the relationship between fascicle length and muscle blood volume or oxygenation in untrained men and women. In 16 untrained men and thirteen untrained women, we measured the total‐[haemoglobin (Hb) + myoglobin (Mb)] (total‐[Hb + Mb]) and relative oxy‐[Hb + Mb] after calibrating baseline and arterial occlusion deoxygenation levels with near‐infrared spectroscopy. Also, fascicle length was measured with B‐mode ultrasonography at the tibialis anterior muscle during passive plantarflexion. Increases in fascicle length from baseline (ankle joint angle 120°, composed from the caput fibulae, the malleolus (pivot), and the distal epiphysis of the fifth metatarsal bone) were greater in women than in men during plantarflexion of 140° and 160° and the maximal angle without pain. However, the decreases in total‐[Hb + Mb] and relative oxy‐[Hb + Mb] from baseline were not different between women and men at any degree of plantarflexion. Moreover, fascicle length and total‐[Hb + Mb]/muscle thickness (men > women) showed a similar relationship, with muscle thickness increasing capillary compression. These findings indicate the possibility of a mechanical function underlying muscle blood volume during muscle stretching, which is greater in women than in men.