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Training and 24-hr urinary catecholamine excretion.

E Filaire¹, M Rouveix, M Duclos

¹LAPSEP, UFRSTAPS, Orléans, France. efilaire@nat.fr

International Journal of Sports Medicine

|July 25, 2008

Summary

Intense athletic training significantly elevated stress markers and reduced performance in young female tennis players. Recovery remained incomplete, indicating potential overtraining by the study

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Area of Science:

Sports Science
Exercise Physiology
Biochemistry

Background:

Athletic training induces physiological and psychological stress.
Monitoring stress and recovery is crucial for athlete performance and health.
Catecholamines and validated questionnaires are used to assess these states.

Purpose of the Study:

To investigate the impact of 28 weeks of training on urinary catecholamine excretion and athlete mood.
To evaluate the relationship between training load, performance, and stress/recovery markers in young female tennis players.

Main Methods:

Longitudinal study involving seven national young female tennis players over 28 weeks.
Measurements included 24-hr urinary catecholamine (epinephrine, norepinephrine) excretion and mood via the Recovery-Stress Questionnaire for Athletes (RESTQ-Sport).
Data collected at three time points: post-rest, 3 months, and 7 months into training.

Main Results:

Training load increased significantly, while performance (win ratio) decreased throughout the study.
Urinary catecholamine excretion and epinephrine/norepinephrine ratio showed an 'U-shaped' curve, peaking at 3 months.
RESTQ-Sport indicated increased stress and incomplete recovery, particularly towards the end of the study.

Conclusions:

Heavy training stress and incomplete recovery were evident in the athletes.
Changes in catecholamine levels and mood scores suggest a state of overreaching or overtraining.
Monitoring both physiological and psychological markers is essential for managing training loads in elite young athletes.