Key Takeaways
  • While exercise is good for your health, excessive training can disrupt hormone balance, leading to increased cortisol and decreased testosterone.
  • Long periods of aerobic exercise and frequent high-intensity training can lead to poor sleep quality, weakened immunity, elevated uric acid levels, and an increased risk of injury.
  • Signs of overtraining include decreased endurance, chronic fatigue, sleep disturbances, low mood, and decreased libido. Early intervention with rest, nutritional support, and planned deloads is effective.
  • Recovery is just as important as training. Focus on sleep, energy intake (calories and carbohydrates), weekly load adjustment, and rest days.

What is Overtraining? When Health Efforts Backfire

While lack of exercise is a concern, there's also a growing number of highly motivated individuals who constantly push themselves with training. Data from the WHO and Japanese surveys show that while many people engage in some form of exercise, there are also cases where excessive loads lead to health problems. Our geefee team has personally experienced intense training several times a week and was surprised by how quickly we recovered when we incorporated proper "rest." Here, we'll discuss the specific negative effects that stoic overtraining can have on your body and practical countermeasures you can implement.

Cortisol and Metabolism: How Fatigue Affects Hormones and Metabolism

The Role of Cortisol and Problems with Excess

Cortisol, known as the "stress hormone," is involved in arousal, metabolic regulation, and energy supply. While moderate secretion is important, prolonged aerobic exercise and frequent high-intensity exercise tend to excessively elevate cortisol. For example, it has been reported that cortisol levels remain high for several days after a long-distance marathon, and chronic elevation can lead to decreased insulin sensitivity, disrupted basal metabolism, and difficulty with weight management.

Practical Measures

- Manage exercise intensity and duration on a weekly basis (balance long days with short days) - Limit high-intensity training to twice a week and avoid doing it on consecutive days - Recover with carbohydrates and protein after exercise, and prioritize sleep

Testosterone and Reproductive Function: The Impact of Pushing Too Hard

Moderate resistance training and HIIT can be expected to increase testosterone, but extreme training can have the opposite effect. Athletes who constantly push themselves too hard have reported decreased blood testosterone and reduced sperm count. If you feel a decrease in libido or a plateau in muscle growth, it's a sign to suspect a hormonal imbalance.

Daily Checks and Solutions

- If decreased libido, erectile dysfunction, or muscle weakness persists, consider consulting a specialist - Incorporating a "deload week" to temporarily reduce training volume often aids recovery (we also found that deloading improved our sleep and mood)

Sleep, Immunity, Uric Acid, and Injury Risk: Unseen Negative Effects

Prolonged training can actually worsen sleep quality. Reports indicate that extreme training, such as for triathlons, can increase sleep disorders, and disrupted sleep negatively impacts cortisol and immune function. Furthermore, intense exercise can temporarily raise uric acid levels due to muscle breakdown and changes in purine metabolism, so those at risk for gout should be cautious. Additionally, chronic fatigue impairs form and concentration, increasing the risk of injury.

Prevention Tips

- Aim for at least 7 hours of sleep, and create a conducive sleep environment by avoiding smartphones before bed - Control sudden uric acid spikes with hydration and electrolyte management (moderate alcohol intake) - If fatigue persists, rest instead of pushing yourself; light aerobic exercise can promote blood flow (active recovery)

Identifying Overtraining and Specific Recovery Strategies

Identification (Self-Check)

- Performance declines even with increased training volume and intensity - Chronic fatigue and prolonged muscle soreness - Decreased sleep quality, morning sluggishness, loss of appetite, low mood - Decreased libido, irregular menstruation (women), and increased susceptibility to colds We were able to notice these changes early by keeping a training diary. Simple indicators to watch out for include a resting heart rate that is 5-10 beats higher than usual, or a clear decrease in heart rate variability (HRV).

Practical Recovery Plan

- Immediate: 48-72 hours of complete rest or very light exercise (walking or stretching) - Short-term: Regularly incorporate a 1-week deload (reduce load by 40-60%) (Guideline: every 3-4 weeks during competition season) - Nutrition: Maintain or slightly increase total calories, aim for 1.6-2.0g/kg protein, prioritize carbohydrate intake for glycogen recovery - Sleep: Establish a bedtime routine and prioritize improving sleep quality - Mental: Balance the autonomic nervous system with deep breathing, meditation, or light yoga If necessary, consulting a sports doctor or trainer for hormone and blood tests is also effective. We especially recommend seeking professional advice if you have sexual dysfunction or prolonged fatigue.

Summary

Exercise is essential for health, but an imbalance in quantity and quality can lead to negative effects such as hormonal imbalances, sleep disorders, weakened immunity, elevated uric acid levels, and injuries. Planning for "rest" and "nutrition" is just as important as training. We have also experienced improved performance and daily well-being by prioritizing deloading and sleep, and we strongly recommend a training plan that avoids overexertion. If discomfort persists, please consult a specialist.

Disclaimer: The information in this article is for general informational purposes only and does not constitute medical advice. Please consult a qualified healthcare professional before making any health-related decisions.