Basal levels of hormones were mostly normal in athletes with OTS/FOR/NFOR compared with healthy athletes .
Distinctly , stimulation tests , mainly performed in maximal exercise conditions , showed blunted GH and ACTH responses in OTS/FOR/NFOR athletes , whereas cortisol and plasma catecholamines showed conflicting findings and the other hormones responded normally .
Conclusion Basal hormone levels are not good predictor but blunted ACTH and GH responses to stimulation tests may be good predictors of OTS/FOR/NFOR
Background Overtraining syndrome ( OTS ) , functional ( FOR ) and non-functional overreaching ( NFOR ) are conditions diagnosed in athletes with decreased performance and fatigue , triggered by metabolic , immune , hormonal and other dysfunctions and result ed from an imbalance between training stress and proper recovery .
Despite previous descriptions , there is a lack of a review that discloses all hormonal findings in OTS/FOR/NFOR .
The aim of this systematic review is to evaluate whether and which roles hormones play in OTS/FOR/NFOR .
Can we detect non-functional overreaching in young elite soccer players and middle-long distance runners using field performance tests?
Objective To study whether field performance tests can make a valid distinction between non-functionally overreaching ( NFO ) athletes and control athletes . Design Monthly field performance tests were used to determine a performance decrement ( PD ) throughout a season . Athletes with a minimum of 1 month PD were compared with control athletes without a PD on mood characteristics and resting levels of stress hormones . Setting Sporting field and sports medical laboratory . Participants 129 young elite athletes , 77 soccer players and 52 middle-long distance runners were followed prospect ively during the 2006–2007 season . Fifteen of them were invited to the laboratory . Eight athletes showed a performance decrease lasting longer than 1 month , and seven athletes without a performance decrease acted as their controls . Main outcome measures Performance changes over time were measured using field tests .  Profile of Mood States and resting levels of adrenocorticotrophic hormone ( ACTH ) and cortisol in blood were measured in the laboratory . Results PD athletes showed several symptoms typical of the non-functional state of overreaching ( OR ) . The PD group scored higher on depression and anger than controls . They also showed a specific pattern of correlations between negative mood subscales ( tension , fatigue and depression ) , which was absent in controls . ACTH levels at rest were similar , but lower cortisol levels in PD athletes pointed at a blunted cortisol response . Cortisol levels were decoupled from ACTH levels only in PD athletes . Conclusions Implementing performance-related criteria in field tests can help coaches and sports physicians to distinguish NFO athletes from athletes with balanced workload and recovery
Basal levels of hormones were mostly normal in athletes with OTS/FOR/NFOR compared with healthy athletes .
Distinctly , stimulation tests , mainly performed in maximal exercise conditions , showed blunted GH and ACTH responses in OTS/FOR/NFOR athletes , whereas cortisol and plasma catecholamines showed conflicting findings and the other hormones responded normally .
Conclusion Basal hormone levels are not good predictor but blunted ACTH and GH responses to stimulation tests may be good predictors of OTS/FOR/NFOR
Background Overtraining syndrome ( OTS ) , functional ( FOR ) and non-functional overreaching ( NFOR ) are conditions diagnosed in athletes with decreased performance and fatigue , triggered by metabolic , immune , hormonal and other dysfunctions and result ed from an imbalance between training stress and proper recovery .
Despite previous descriptions , there is a lack of a review that discloses all hormonal findings in OTS/FOR/NFOR .
The aim of this systematic review is to evaluate whether and which roles hormones play in OTS/FOR/NFOR .