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Updated: Aug 13, 2026

Combining Behavioral Endocrinology and Experimental Economics: Testosterone and Social Decision Making
Published on: March 3, 2011
Chronoendocrinological studies in athletes. III. Certain psychoendocrinological correlations
Healthy athletes exhibit significant daily rhythms in mood and well-being. Personality traits in fencers correlated with circadian hormone levels, but not all psychological tests showed these links.
Area of Science:
- Sports Science
- Psychology
- Endocrinology
Background:
- Circadian rhythms influence physiological and psychological functions.
- Understanding these rhythms in athletes is crucial for performance and well-being.
Purpose of the Study:
- To investigate circadian rhythms in psychological parameters of athletes.
- To explore correlations between personality factors and circadian hormone levels in fencers.
Main Methods:
- Cosinor analysis was used to validate and quantify circadian rhythms in 83 healthy athletes.
- The Cattell 16PF questionnaire assessed personality factors in 32 fencers.
- Blood samples were analyzed for hormone concentrations (T3, TSH, CSL, T, HGH, IRI).
Main Results:
- Statistically significant circadian rhythms were found in psychological parameters like well-being, activation, and mood.
- Significant correlations were observed between certain personality factors and mean circadian hormone blood concentrations in fencers.
- No significant correlations were found between Eysenck test or D48 test parameters and the studied circadian hormone levels.
Conclusions:
- Circadian rhythms significantly impact psychological states in healthy athletes.
- Specific personality traits may interact with hormonal circadian patterns in athletes.
- Further research is needed to elucidate the complex interplay between personality, hormones, and circadian rhythms in athletic populations.
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