短时间力竭运动血清生长激素水平与血糖和血乳酸浓度相关性研究

Effects of Blood Glucose and Blood Lactate on Growth Hormone ReleaseAfter a Short-time Exercise to Exhaustion

测定了男性大学生短时间力竭运动前后不同时刻血清GH、BG和LA的浓度。结果显示:短时间力竭运动后即刻BG浓度显著高于运动前安静值(P<0 01);运动后30min、运动后60min时BG浓度与安静值无显著性差异,运动后BG浓度呈恢复趋势;运动后即刻、运动后30min时血液LA水平显著高于运动前安静值(P<0 01),运动后60min时LA水平高于运动前安静值(P<0 05),呈恢复趋势;短时间力竭运动后血液LA浓度的变化与GH浓度的变化呈显著正相关(r=0 83,P<0 01)。研究认为,剧烈运动后血液LA水平与GH水平所表现出的相关性有可能是两者与运动强度的相关,安静时低BG所引起的GH分泌增多取决于中枢对BG代谢的利用性,而非血液BG水平。

To examine the influence of blood lactate (LA) and blood glucose (BG) after a short-time incremental graded exercise to exhaustion on serum growth hormone (GH) concentrations; We measured serum LA,BG and GH concentrations in 10 healthy freshmen (male, 20.70±0.82 years). Blood samples were obtained before exercise and then 0 (immediately), 30, 60 min post exercise; The results were that LA concentrations at the 0 and 30 min post exercise were significantly higher (P<0.01) than pre-exercise, and subsequently declined back to baseline by 60 min; At 0 min post exercise, BG concentration was significantly higher than pre-exercise, and no significant differences among pre-exercise, 30 and 60 min post exercise. The changes in LA was significantly positive correlation with serum GH concentration after a short-time incremental graded exercise(r=0.83, P<0.01),this correlation maybe is the correlation that both GH and LA were found with exerciser intensity. The response of the GH-BG metabolism is governed by the changes in BG at rest, whereas it may depend on the total quantity of glucose released or utilized.