Nie J, Tong T K, Shi Q, Lin H, Zhao J, Tian Y
School of Physical Education and Sports, Macao Polytechnic Institute, Macao, China.
Int J Sports Med. 2008 Jun;29(6):449-52. doi: 10.1055/s-2007-989236. Epub 2007 Nov 14.
Cardiac troponin release is generally found in adult athletes after continuous-type endurance exercises or sport competitions. The purpose of this study was to investigate whether the physical stress experienced by adolescents while playing basketball, an intense, intermittent-type sport, could induce transient elevations of the serum cardiac troponin T (cTnT) and I (cTnI). Serum cTnT and cTnI levels in 10 male adolescent players (age 15.0 +/- 0.7 yr) were assessed immediately before and at 2, 4 and 24 h after a game randomly selected from a preseason basketball-training program. At 4 h following the game, serum cTnT levels in four of the ten subjects were above the cutoff of 0.01 ng . ml (-1) for myocardial injury. Two of these four subjects had values higher than the acute myocardial infarction cutoff of 0.05 ng . ml (-1). In three of the four subjects, the serum cTnI was above the cutoff of 0.06 ng . ml (-1) for myocardial injury. Nevertheless, serum cardiac troponins at 24 h had returned to pre-exercise levels. These findings suggest that the physical stress encountered during intense, intermittent-type sports could cause release of cardiac troponins in some adolescents at low risk for cardiac disease.
在成年运动员进行持续耐力运动或体育比赛后，通常会发现心肌肌钙蛋白释放。本研究的目的是调查青少年在进行篮球运动（一种激烈的间歇性运动）时所经历的身体压力是否会导致血清心肌肌钙蛋白T（cTnT）和I（cTnI）短暂升高。从季前篮球训练计划中随机选择一场比赛，在比赛前以及比赛后2小时、4小时和24小时，对10名男性青少年运动员（年龄15.0±0.7岁）的血清cTnT和cTnI水平进行评估。比赛后4小时，10名受试者中有4名的血清cTnT水平高于心肌损伤的临界值0.01 ng·ml⁻¹。这4名受试者中有2名的值高于急性心肌梗死的临界值0.05 ng·ml⁻¹。在这4名受试者中的3名中，血清cTnI高于心肌损伤的临界值0.06 ng·ml⁻¹。然而，24小时时的血清心肌肌钙蛋白已恢复到运动前水平。这些发现表明，在激烈的间歇性运动中遇到的身体压力可能会导致一些患心脏病风险较低的青少年释放心肌肌钙蛋白。
