Sejersted O M, Vøllestad N K, Medbø J I
Acta Physiol Scand Suppl. 1986;556:119-27.
During shortlasting exhausting exercise plasma volume is decreased by up to 20%. Water is probably taken up by muscle cells since the concentration of small plasma solutes like Na+ and Cl- increases in parallel with the hemoglobin concentration. During the first 4 min of the recovery phase the extracellular distribution volume for NaCl seems to be restored as evidenced by normalization of the plasma sodium and chloride concentrations. However, the plasma volume is restored at a much slower rate by recapture of isotonic fluid. Interestingly, arterial lactate concentrations are normalized at the same rate. We propose that immediately after end of shortlasting exercise the swollen muscle cells rapidly reduce their volume. Fluid will accumulate in the interstitium since reuptake of fluid into the capillaries is a much slower process.
在持续时间较短的高强度运动期间，血浆量会减少多达20%。由于血浆中诸如Na+和Cl-等小分子溶质的浓度与血红蛋白浓度同步增加，水可能被肌肉细胞摄取。在恢复阶段的前4分钟，血浆钠和氯浓度恢复正常，这表明NaCl的细胞外分布容积似乎得到了恢复。然而，通过等渗液体的重吸收，血浆量的恢复速度要慢得多。有趣的是，动脉血乳酸浓度以相同的速度恢复正常。我们认为，在持续时间较短的运动结束后，肿胀的肌肉细胞会迅速缩小其体积。由于液体重新进入毛细血管的过程要慢得多，液体会在间质中积聚。
