Protein & carbohydrate supplementation during aerobic training increased plasma volume and thermoregulatory capacity in younger and older men

2002年，我们研究了一次运动对年轻和老年男性运动后24小时血浆容量和血浆蛋白含量的影响。此外，我们还研究了运动后立即补充蛋白质和碳水化合物（CHO）对运动诱导的血浆体积（PV）扩张的影响。我们发现年轻男性的PV增加，而年长男性则没有。然而，两组的PV和血浆蛋白含量均增加。2003年，我们研究了在2个月的耐力训练中补充蛋白质和CHO对老年男性体温调节能力的影响。在食道温度升高的情况下，补品显著增强皮肤血管舒张和出汗率。2004年，我们研究了补充剂是否能提高年轻男性10天耐力训练后的调节能力。正如我们假设的那样，我们发现补充组的体温调节能力得到了增强。然而，在给定运动强度下，我们没有发现补充组和未补充组在PV、最大有氧能力和心输出量的增加方面有任何显著差异。这些结果表明，在耐力训练中补充蛋白质和CHO可以增强老年和年轻男性的体温调节能力。然而，目前尚不清楚这是否是由于血浆蛋白含量增加导致PV扩张增强引起的。

In 2002, we studied the effects of a bout of exercise on plasma volume and plasma protein content 24 hrs after the exercise in younger and older men. Moreover, we studied the effects of protein and carbohydrate (CHO) supplementation immediately after the exercise on exercise induced plasma volume (PV) expansion. We found that the PV increased in the younger men while not in the older men. However, the supplementation increased PV and plasma protein content in both groups.In 2003, we studied the effects of protein and CHO supplementation during 2-month endurance training on thermoregulatory capacity in older men. The supplementation significantly enhanced cutaneous vasodilation and sweating rate at a given increase in esophageal temperature.In 2004, we examined whether the supplementation enhanced the improvement of thamoregulatory capacity after 10-day endurance training in younger men. As we hypothesized, we found that the improvement of thermoregulatory capacity was enhanced in the supplementation group. However, we failed to find any significant differences in the increases in PV, maximal aerobic power, and cardiac output at a given intensity of exercise between the groups with and without supplementation.These results suggest that the supplementation of protein and CHO during endurance training enhanced thermoregulatory capacity in older and younger men. However, it remains unknown whether it is caused by enhanced PV expansion due to greater ircrease in plasma protein content.