Feeling depressed after strength exercise is not a common or typical response, and it's understandable that you find it concerning. While I'm not a medical professional, I can suggest some potential reasons why this might be happening. However, it's essential to consult with a healthcare provider to get a proper evaluation and personalized advice.
Neurotransmitter imbalances: Different types of exercises can affect neurotransmitter levels in the brain. Cardio exercises like running or cycling can release endorphins, which are feel-good chemicals that can improve mood. On the other hand, strength exercises may involve higher levels of cortisol, a stress hormone. Some individuals might be more sensitive to cortisol, leading to a temporary negative impact on mood.
Overtraining: Excessive or intense strength training without sufficient rest and recovery can lead to overtraining, causing physical and mental exhaustion. This can contribute to feelings of sadness and depression.
Psychological associations: There might be psychological associations or past experiences linked to strength exercises that trigger negative emotions. For example, if you had a negative experience while lifting weights in the past, your brain might associate the activity with sadness or depression.
Hormonal factors: Hormonal changes can influence mood, and certain exercises may have varying effects on hormone levels. For instance, strength exercises can temporarily affect testosterone and other hormones, which might contribute to mood fluctuations.
Individual differences: Every person's body and mind respond differently to exercise. Some individuals might experience a positive mood boost from cardio but not necessarily from strength training.
Since your doctor has ruled out any obvious medical issues and you maintain a healthy lifestyle, it might be beneficial to keep a journal to track your mood before and after each exercise session. This could help identify patterns or triggers that may be contributing to your feelings of depression after strength exercises.
Additionally, consider modifying your strength training routine to see if specific exercises, intensity levels, or duration might be influencing your mood differently. Integrating relaxation techniques like yoga or stretching after strength exercises might also help mitigate negative feelings.
Lastly, don't hesitate to consult with a mental health professional who can provide further insights and support. They can help you explore any underlying emotional or psychological factors that might be influencing your response to strength exercise.
Remember, your well-being is essential, and seeking professional guidance can help you better understand and address this issue effectively.