How should overtraining syndrome be managed in athletes?

Management of Overtraining Syndrome in Athletes

The cornerstone of managing overtraining syndrome is complete rest from training, as this remains the only proven treatment once the syndrome manifests. 1, 2

Immediate Management: Rest as Primary Intervention

• Prescribe complete cessation of training when OTS is diagnosed, as the condition represents a maladapted response to excessive exercise without adequate recovery that affects multiple body systems (neurologic, endocrinologic, immunologic). 1
• Rest periods must be prolonged—weeks to months may be required for full recovery, as OTS is characterized by performance decline lasting more than 4 weeks despite continued training attempts. 3, 4
• The insidious onset means that by the time OTS is recognized, standard recovery periods are no longer effective, necessitating extended time away from sport. 5

Diagnostic Approach: Exclusion and Multimodal Assessment

Since OTS remains a diagnosis of exclusion without a gold standard test, you must systematically rule out other causes of underperformance while documenting the characteristic pattern. 1, 4

Key Diagnostic Criteria to Document:

• Performance decline lasting >4 weeks despite maintaining or reducing training load, accompanied by persistent fatigue. 3, 4
• Psychological symptoms including depressed mood, which result from central nervous system effects of systemic inflammation. 6
• Autonomic dysfunction manifesting as altered heart rate variability and cardiovascular regulation changes. 6, 4

Diagnostic Tools with Evidence Support:

• EROS diagnostic scores (EROS-CLINICAL, EROS-SIMPLIFIED, EROS-COMPLETE) combine hormonal, metabolic, and clinical parameters and represent the most structured diagnostic approach currently available. 4
• Basal hormone levels (particularly cortisol, testosterone) and hormonal responses to stimulation tests show alterations reflecting neuroendocrine system failure. 4
• Psychological questionnaires to objectively document mood changes and central fatigue. 4
• Heart rate variability monitoring to assess autonomic nervous system dysfunction. 4

Prevention Through Load Management

Prevention is far more effective than treatment, as OTS can be career-ending once established. 7, 5

Training Load Monitoring Strategy:

• Monitor both external load (distance, power output via tracking devices) and internal load (rate of perceived exertion, heart rate responses) to assess the psychophysiological response to training. 8
• Use blood biomarkers (creatine kinase, urea, C-reactive protein, myoglobin) in combination with subjective monitoring tools and performance data, not in isolation. 8
• Avoid rapid increases in training load and competition calendar congestion, which are significant risk factors for OTS development. 7

Recovery Monitoring:

• Implement regular assessment using the Acute Recovery and Stress Scale or similar validated questionnaires. 8
• Track athlete well-being alongside training metrics, as psychological load contributes to OTS risk. 7
• Ensure adequate rest periods are prescribed and enforced, as the syndrome results from inadequate recovery between training stimuli. 1, 2

Nutritional Considerations

• Optimize nutrition to prevent glycogen depletion, which is one hypothesis for OTS pathogenesis, though specific dietary interventions for established OTS lack strong evidence. 6, 9
• Address sleep deprivation and stress, as these factors influence morbidity rates in athletes with OTS. 6

Critical Pitfalls to Avoid

• Do not continue training through suspected OTS, hoping for adaptation—this worsens the condition and prolongs recovery. 1, 2
• Do not rely on single biomarkers for diagnosis, as OTS is multisystemic and requires assessment across physiological, psychological, and performance domains. 4
• Do not mistake overreaching for OTS—overreaching recovers within days to weeks with rest and can lead to performance gains, while OTS requires months of recovery and may end careers. 5, 1
• Recognize that heart rate alone is inadequate for monitoring internal load in intermittent sports or resistance training. 8

Monitoring During Recovery

• Conduct controlled exercise testing (submaximal and maximal) to assess hormonal and inflammatory responses, which are more effective than resting measures for characterizing recovery status. 10
• Document return of normal autonomic function through heart rate variability before clearing athletes to resume training. 4
• Ensure psychological symptoms resolve alongside physiological markers, as central nervous system effects are integral to the syndrome. 6

The IOC consensus emphasizes that inappropriate load management is the primary modifiable risk factor, making prevention through systematic monitoring and enforced recovery periods the most effective strategy. 7