Impact of supine versus upright exercise on muscle deoxygenation heterogeneity during ramp incremental cycling is site specific.
Impact of supine versus upright exercise on muscle deoxygenation heterogeneity during ramp incremental cycling is site specific.
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DOI：
10.1007/s00421-021-04607-6
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发表时间：
2021-05
影响因子：
3
通讯作者：
Koga S
中科院分区：
文献类型：
--
作者：
Goulding RP;Okushima D;Fukuoka Y;Marwood S;Kondo N;Poole DC;Barstow TJ;Koga S
我们检验了以下假设：与直立位（U）相比，在仰卧位（S）进行的递增坡道自行车运动与股外侧深肌和股外侧浅肌（分别为VLd和VL）以及股直肌浅肌（RFs）对肌肉脱氧（脱氧[血红素]）的依赖性增加相关。11名健康男性在美国和美国完成了递增负荷运动试验。通过呼吸测量肺O2;通过VLd、VL和RF中的时间分辨近红外光谱测定脱氧[血红素]。仰卧位运动增加了VLs（S：38 ± 23 vs. U：26 ± 15 μM，P < 0.001）和RFs（S：36 ± 21 vs. U：25 ± 15 μ M，P < 0.001）中从基线到最大运动的脱氧[血红素]的总体变化，但VLd中没有（S：32 ± 23 vs. U：29 ± 26 μM，P > 0.05）。本研究支持，在仰卧位运动过程中观察到的O2输送和O2利用之间的平衡受损是浅表肌肉内的区域现象。因此，深层肌肉捍卫其O2输送/利用平衡对仰卧引起的灌注压降低。这些肌肉区域的不同反应可以解释为血管和代谢控制特性的区域异质性，可能与纤维类型组成有关。
We tested the hypothesis that incremental ramp cycling exercise performed in the supine position (S) would be associated with an increased reliance on muscle deoxygenation (deoxy[heme]) in the deep and superficial vastus lateralis (VLd and VLs, respectively) and the superficial rectus femoris (RFs) when compared to the upright position (U). 11 healthy men completed ramp incremental exercise tests in S and U. Pulmonary O2 was measured breath-by-breath; deoxy[heme] was determined via time-resolved near-infrared spectroscopy in the VLd, VLs and RFs. Supine exercise increased the overall change in deoxy[heme] from baseline to maximal exercise in the VLs (S: 38 ± 23 vs. U: 26 ± 15 μM, P < 0.001) and RFs (S: 36 ± 21 vs. U: 25 ± 15 μM, P < 0.001), but not in the VLd (S: 32 ± 23 vs. U: 29 ± 26 μM, P > 0.05). The present study supports that the impaired balance between O2 delivery and O2 utilization observed during supine exercise is a regional phenomenon within superficial muscles. Thus, deep muscle defended its O2 delivery/utilization balance against the supine-induced reductions in perfusion pressure. The differential responses of these muscle regions may be explained by a regional heterogeneity of vascular and metabolic control properties, perhaps related to fiber type composition.
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影响因子：
3.3
作者：
DiMenna, Fred J.;Wilkerson, Daryl P.;Jones, Andrew M.
通讯作者：
Jones, Andrew M.
影响因子：
2.5
作者：
Fukuoka Y;Poole DC;Barstow TJ;Kondo N;Nishiwaki M;Okushima D;Koga S
通讯作者：
Koga S
DOI：
10.1249/mss.0b013e3181c0ecea
发表时间：
2010-05-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Boone, Jan;Koppo, Katrien;Bouckaert, Jacques
通讯作者：
Bouckaert, Jacques
影响因子：
3.3
作者：
Ferreira, Leonardo F.;Koga, Shunsaku;Barstow, Thomas J.
通讯作者：
Barstow, Thomas J.
影响因子：
3.3
作者：
Ferreira, Leonardo F.;Hueber, Dennis M.;Barstow, Thomas J.
通讯作者：
Barstow, Thomas J.