Sweat lactate, ammonia, and urea in rugby players
Sweat lactate, ammonia, and urea in rugby players
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DOI：
10.1055/s-2004-830380
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发表时间：
2005-10-01
影响因子：
2.5
通讯作者：
González-Gallego, J
中科院分区：
文献类型：
--
作者：
Alvear-Ordenes, I;García-López, D;González-Gallego, J
本研究的目的是调查橄榄球运动员的汗液乳酸、氨和尿素排泄情况。15名优秀的业余橄榄球运动员自愿参加。这项研究是在正式赛季的比赛中进行的。在比赛前后测量血浆和汗液中乳酸、氨和尿素的浓度。匹配后24 h肌酸激酶活性达到峰值。血乳酸浓度在不同时间点间无明显变化，但单位表面和时间的分泌速率明显降低。比赛过程中汗液氨浓度显著升高；分泌率也从24 h开始降低。尿素浓度在48 h显著降低，而分泌率在24 h和48 h下降。血液中乳酸在比赛期间显著升高，但此后没有升高。血氨在比赛期间显著升高，与24或48小时的静息值没有差异。血液中的尿素在比赛期间趋于下降，在24小时显著下降。血液和汗液中尿素和氨的浓度呈显著正相关，但乳酸的浓度没有显著正相关。出汗率与汗液乳酸分泌呈正相关。在运动过程中形成的部分氨会随着汗水流失，这一事实表明了橄榄球比赛中嘌呤核苷酸循环的重要性。我们的数据也证实了橄榄球运动员的汗液乳酸浓度不受循环血液乳酸的影响。
The purpose of this study was to investigate sweat lactate, ammonia, and urea excretion in rugby players. Fifteen elite amateur rugby players volunteered to participate. The study was conducted during competitive matches in the official season. Plasma and sweat concentrations of lactate, ammonia, and urea were measured before and after the matches. Peak values for creatine kinase activity were observed 24 h after the match. There was no significant change between time points for blood lactate concentration but secretion rate per unit surface and time was significantly reduced after the match. Sweat ammonia concentration increased significantly during the match; values were significantly reduced after 24 h and still remained low at 72 h. Secretion rate was also reduced from 24 h. Urea concentration was significantly reduced at 48 h, while secretion rates decreased at 24 h and 48 h. Lactate in blood was significantly elevated during the match but not thereafter. Blood ammonia was significantly elevated during the match and did not differ from the resting values at 24 or 48 h. Urea in blood tended to decrease during the match, with a significant reduction at 24 h. Significant positive correlations were observed between blood and sweat concentrations for urea and ammonia but not for lactate. Sweat rate correlated positively with sweat lactate secretion. The fact that part of the ammonia formed during exercise is lost with sweat indicates the importance of the purine nucleotide cycle during rugby matches. Our data also confirm that sweat lactate concentration is not influenced by circulatory blood lactate in rugby players.