The 24 h urinary cortisol/cortisone ratio and epinephrine/norepinephrine ratio for monitoring training in young female tennis players.
The 24 h urinary cortisol/cortisone ratio and epinephrine/norepinephrine ratio for monitoring training in young female tennis players.
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24小时尿皮质醇/可的松比值和肾上腺素/去甲肾上腺素比值用于监测年轻女子网球运动员的训练。
DOI：
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发表时间：
2006
影响因子：
2.5
通讯作者：
E. Filaire
中科院分区：
文献类型：
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作者：
M. Rouveix;M. Duclos;C. Gouarné;M. Beauvieux;E. Filaire
在7名受过训练的年轻女子网球运动员（12.8 ± 1.7岁）中，研究了训练变化对24小时尿皮质醇/可的松（C/Cn）比值和肾上腺素/去甲肾上腺素（E/NE）比值与情绪（使用Brunel情绪量表：BRUMS评估）和表现的影响。像建议的模型在成人中，激素和情绪参数的监测可能是一个有用的指标，在训练后续的年轻女运动员。通过营养摄入量、氮排泄率和氮平衡的测定，了解运动员的饮食习惯。根据平均每日蛋白质摄入量和尿氮排泄量计算氮平衡。在休息1个月后（9月，T1），T1后3个月（技术和耐力训练后：12月，T2）和T1后7个月（4个月的增量/高强度训练后：3月，T3）收集数据。从T1到T3，观察到C/Cn比值显著增加（± 30%，p < 0.05）。同时，尿NE浓度显著降低。E/NE比值从T1到T2增加，在T3降低（T1对T3：-30%，p < 0.05）。在T3的BRUMS清单反映了特定情绪状态的变化，疲劳和愤怒分数显着增加，而活力分数显着下降相比，T1。这一时期也对应着最低的比赛获胜率和最高的训练负荷。能量摄入量比法国同龄女孩的建议低约16%。然而，从1.0 g x kg（-1）x天（-1）的平均摄入量观察到正氮平衡。我们的研究结果表明，夜间尿C/Cn比值的增加和E/NE比值的降低与情绪状态和表现的变化同时发生，所有这些参数都与身体和心理压力有关。
The effect of training variations on the 24 h urinary cortisol/cortisone (C/Cn) ratio and the epinephrine/norepinephrine (E/NE) ratio in relation with mood (evaluated using the Brunel Mood Scale: BRUMS) and performance was investigated in seven trained young female tennis players (12.8 +/- 1.7 years). Like the proposed model in adults, the monitoring of hormonal and mood parameters could be a useful index in training follow-up in young sportswomen. Assessment of nutritional intake, nitrogen excretion rate and nitrogen balance were also determined to measure the dietary practice of these athletes. Nitrogen balance was calculated from the mean daily protein intake and the urinary nitrogen excretion. Data were collected after a 1-month rest (September, T1), 3 months after T1 (after technical and endurance training: December, T2) and 7 months after T1 (after 4 months of increasing-volume/high-intensity training: March, T3). A significant increase in C/Cn ratio (+ 30 %, p < 0.05) were noted from T1 to T3. In the same time, urinary NE concentrations decreased significantly. The E/NE ratio increased from T1 to T2 and decreased at T3 (T1 vs. T3: - 30 %, p < 0.05). The BRUMS inventory at T3 reflected changes in specific mood states with a significant increase in fatigue and anger scores, while vigor scores decreased significantly compared to T1. This period also corresponded with the lowest percentage of matches won and with the highest training load. Energy intake was about 16 % lower than the French recommendations for girls of the same age. However, a positive nitrogen balance was observed from a mean intake of 1.0 g x kg (-1) x day (-1). Our results reveal that an increase of overnight urinary C/Cn ratio and a decrease of E/NE ratio are concomitant with alterations in mood state and performance, all these parameters being associated with physical and psychological stress.