Beneke Ralph, Hütler Matthias, Leithäuser Renate M
Centre for Sport and Exercise Science, Department of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK.
Eur J Appl Physiol. 2009 Jan;105(2):257-63. doi: 10.1007/s00421-008-0897-1. Epub 2008 Nov 12.
The half maximal constant (k (el)) of the relative rate of carbohydrate oxidation (relCHO) was individually approximated (relCHO = 100/(1 + k (el)/BLC(2)) as a function of the blood lactate concentration (BLC) in 11 pre-pubertal boys and 11 male adolescents (age: 11.6 +/- 0.1 vs. 16.4 +/- 0.2 years, height: 151.6 +/- 1.7 vs. 182.4 +/- 2.3 cm, body mass: 38.2 +/- 1.1 vs. 68.7 +/- 2.3 kg, all P < 0.001) during incremental cycle ergometry. k (el) explained 89.0 +/- 2.2 and 91.9 +/- 2.2% of the variance of the reliance on CHO in boys and adolescents respectively (both P < 0.001). No difference in k (el) [1.34 +/- 0.40 vs. 1.48 +/- 0.30 (mmol l(-1))(2)] was found between boys and adolescents. The BLC was lower (P < 0.05) in boys when relCHO was higher than 91.2 +/- 2.1 and 92.1 +/- 1.3% in boys and adolescents respectively. This seems to explain why the reliance on CHO and the BLC are independent of maturation in the moderate and heavy exercise intensity domain and the BLC but not the relCHO which is higher under severe and maximal exercise conditions in more mature subjects.
在递增式自行车测功试验中，分别对11名青春期前男孩和11名男性青少年的碳水化合物氧化相对速率（relCHO）的半最大常数（k(el)）进行了估算（relCHO = 100 / (1 + k(el) / BLC²)），其中BLC为血乳酸浓度（年龄：11.6±0.1岁对16.4±0.2岁，身高：151.6±1.7厘米对182.4±2.3厘米，体重：38.2±1.1千克对68.7±2.3千克，所有P<0.001）。k(el)分别解释了男孩和青少年碳水化合物依赖度方差的89.0±2.2%和91.9±2.2%（均P<0.001）。男孩和青少年之间未发现k(el)存在差异[1.34±0.40对1.48±0.30(mmol l⁻¹)²]。当relCHO分别高于男孩和青少年的91.2±2.1%和92.1±1.3%时，男孩的BLC较低（P<0.05）。这似乎解释了为什么在中等和高强度运动领域，碳水化合物依赖度和BLC与成熟度无关，而在更成熟的受试者中，在剧烈和最大运动条件下，BLC与成熟度无关，但relCHO较高。
