Lithell H, Orlander J, Schéle R, Sjödin B, Karlsson J
Acta Physiol Scand. 1979 Nov;107(3):257-61. doi: 10.1111/j.1748-1716.1979.tb06471.x.
Lipoprotein-lipase (LPL) activity and intracellularly stored triglycerides were determined in muscle biopsies taken before and after an 85 km skiing race from 7 volunteers. The triglyceride stores were larger in slow twitch than in fast twitch fibres (proportions 5:1 before the race). The LPL activity increased and the triglyceride stores in slow twitch fibres decreased during the race. The best trained subjects had the largest TG stores before the race and their TG stores also decreased most during the race. These subjects also had very small increase of LPL activity. The least trained subject on the other hand showed a 6-fold increase of LPL activity. The high post-race LPL activity in less trained subjects indicates a higher capacity for uptake of fatty acids from serum TG as compared to the more trained subjects.
在7名志愿者进行85公里滑雪比赛前后采集的肌肉活检样本中，测定了脂蛋白脂肪酶（LPL）活性和细胞内储存的甘油三酯。慢肌纤维中的甘油三酯储存量比快肌纤维中的大（比赛前比例为5:1）。比赛期间，慢肌纤维中的LPL活性增加，甘油三酯储存量减少。训练最有素的受试者在比赛前甘油三酯储存量最大，比赛期间他们的甘油三酯储存量减少也最多。这些受试者的LPL活性增加也非常小。另一方面，训练最少的受试者LPL活性增加了6倍。训练较少的受试者赛后LPL活性较高，表明与训练较多的受试者相比，其从血清甘油三酯中摄取脂肪酸的能力更强。
