Key result
28 weeks of training in female tennis players caused an initial increase in urinary epinephrine (+100%, p<0.05) and norepinephrine (+30%, p<0.05), followed by a decrease indicating heavy stress.
Why the study?
Does 28 weeks of training affect 24-hr urinary catecholamine excretion and mood in young female tennis players?
Observational (n=7)
Does 28 weeks of training affect 24-hr urinary catecholamine excretion and mood in young female tennis players?
p-value: p=<0.05
Intense training over 28 weeks in young female tennis players leads to a U-shaped curve in urinary catecholamine excretion and increased stress scores, indicating incomplete recovery.
May signal overtraining risk during prolonged training in young female athletes; leaves open prospective validation before clinical monitoring use.
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Filaire et al. (2008) conducted an observational in Healthy athletes (tennis players) (n=7). 28 weeks of training vs. Baseline (1-month rest) was evaluated on 24-hr urinary catecholamine excretion and mood (p=<0.05). 28 weeks of training in female tennis players caused an initial increase in urinary epinephrine (+100%, p<0.05) and norepinephrine (+30%, p<0.05), followed by a decrease indicating heavy stress.
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