Effects of four weeks L-carnitine L-tartrate ingestion on substrate utilization during prolonged exercise

Effects of four weeks L-carnitine L-tartrate ingestion on substrate utilization during prolonged exercise
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DOI:
10.1123/ijsnem.15.6.665
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发表时间:
2005-12-01
影响因子:
2.5
通讯作者:
Galloway, SDR
Galloway, SDR
中科院分区:
医学2区
文献类型:
--
作者:
Broad, EM;Maughan, RJ;Galloway, SDR

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在一项随机、安慰剂对照、双盲交叉设计中,15名受过训练的男性在两个为期4周的补充期内进行了运动试验,每天服用3 g L-酒石酸左旋肉碱(LCLT)或3 g安慰剂(P)。在LCLT或P试验中,90分钟稳态循环期间的总碳水化合物和脂肪氧化在0周或4周之间没有差异(平均标准差:碳水化合物氧化P-0 99 +/- 36,P-4 W III +/- 27,LCLT 107 +/- 33,LCLT 4 W 112 +/- 32 g;脂肪氧化P-0 99 +/- 28,P-4 W 92 +/- 21,LCLT 0 94 +/- 18,LCLT 4 W 90 +/- 22 g)。随后的20 km计时赛持续时间在P后较短(P-0 31:29 +/- 3:50,P-4 W 29:55 +/- 2:58 min:s,P < 0.01),与LCLT相比无显著变化(LCLT 0 31:46 +/- 4:06,LCLT 4 W 31.19 +/- 4.08 min:s)。四周LCLT补充对底物利用率或耐力表现没有影响。
In a randomized, placebo-controlled, double-blind crossover design, 15 trained males undertook exercise trials during two 4 wk supplementation periods, with either 3 g L-Carnitine L-tartrate (LCLT) or 3 g placebo (P) daily. Total carbohydrate and fat oxidation during 90 min steady state cycling were not different between 0 or 4 wk within LCLT or P trials (mean standard deviation: carbohydrate oxidation P-0 99 +/- 36, P-4W III +/- 27, LCLT, 107 +/- 33, LCLT4W 112 +/- 32 g, respectively; fat oxidation P-0 99 +/- 28, P-4W 92 +/- 21, LCLT0 94 +/- 18, LCLT4W 90 +/- 22 g, respectively). Subsequent 20 km time trial duration was shorter after P (P-0 31:29 +/- 3:50, P-4W 29:55 +/- 2:58 min:s, P < 0.01), with no significant change over LCLT (LCLT0 31:46 +/- 4:06, LCLT4W 31.19 +/- 4.08 min:s). Four weeks LCLT supplementation had no effect on substrate utilization or endurance performance.