PLASMA-VOLUME, RENIN, AND VASOPRESSIN RESPONSES TO GRADED-EXERCISE AFTER TRAINING
PLASMA-VOLUME, RENIN, AND VASOPRESSIN RESPONSES TO GRADED-EXERCISE AFTER TRAINING
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DOI：
10.1152/jappl.1983.54.2.508
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发表时间：
1983-01-01
影响因子：
3.3
通讯作者：
GREENLEAF, JE
中科院分区：
文献类型：
--
作者：
CONVERTINO, VA;KEIL, LC;GREENLEAF, JE
为了研究运动训练对运动过程中体液转移和内分泌反应的影响，我们测量了4名男性在休息和坐式测力仪（100、175和225 W）训练前后静脉血中的血浆体积（PV）、肾素活性（PRA）、渗透压（Osm）和抗利尿激素（PVP）浓度（每天2小时，持续8天，Tdb 25度）。C，达到最大氧摄取的65% [.ovrhdot]。最大摄氧量])。训练后，静息PV增加12.3% (440 ml, P < 0.05)，升高0.04%。VO2 max增加11.2% （P < 0.05）。结果表明，100、175和225 W的相对工作强度分别比.ovrhdot的48%、75%和89%降低（P < 0.05）。训练前的最大摄氧量分别为42,69和83%。分别为训练后的最大摄氧量。随着工作强度的增加，PV呈线性下降，而PRA、Osm和PVP浓度呈曲线上升。与训练前相比，训练后175和225 W时Osm、PVP、PRA水平和PV变化（. delta .）均降低（P < 0.05），只有在训练强度超过50%时才高于静息水平（P < 0.05）。最大摄氧量。.DELTA。Osm与%. delta相关。PV (r = -0.80, P < 0.05)；PVP （r = +0.88, P < 0.05）。运动训练降低了体液内分泌对绝对工作水平的反应，而在相似的相对运动强度下，PV、Osm、PVP和PRA的变化与训练水平无关。阈值为50% .ovrhdot。在运动中需要最大摄氧量来增加PRA、Osm和PVP浓度。
To investigate the effects of exercise training on fluid shifts and endocrine responses during exercise, plasma volume (PV), renin activity (PRA), osmolality (Osm) and vasopressin (PVP) concentrations were measured in venous blood obtained during rest and sitting ergometer exercise (100, 175 and 225 W) from 4 men before and after training on a cycle ergometer (2 h/day for 8 days, Tdb 25.degree. C, at 65% of their maximal O2 uptake [.ovrhdot.VO2 max]). After training, resting PV increased by 12.3% (440 ml, P < 0.05) and .ovrhdot.VO2 max increased by 11.2% (P < 0.05). Consequently, the relative work intensities at 100, 175 and 225 W decreased (P < 0.05) from 48, 75 and 89% of .ovrhdot.VO2 max before training to 42, 69 and 83% of .ovrhdot.VO2 max, respectively, after training. With increasing work intensity, PV decreased linearly while the PRA and Osm and PVP concentrations increased in a curvilinear fashion. Compared with pretraining values, the levels of Osm, PVP, PRA and the change (.DELTA.) in PV were reduced (P < 0.05) at 175 and 225 W after training and they were elevated (P < 0.05) above resting levels only when work intensity exceeded 50% .ovrhdot.VO2 max. The .DELTA. Osm was correlated with %.DELTA.PV (r = -0.80, P < 0.05) and with .DELTA.PVP (r = +0.88, P < 0.05). Fluid-endocrine response to the absolute work level is reduced by exercise training, while a similar relative exercise intensity produces similar PV, Osm, PVP and PRA changes independent of training level. A threshold of 50% .ovrhdot.VO2 max is required to increase PRA, Osm, and PVP concentrations during exercise.