Why do my legs feel weak and soft?

Common causes of weak and soft legs:

1. Physiological factors: Prolonged standing, walking, or strenuous exercise may cause leg muscle fatigue and a feeling of weakness. Rest and appropriate massage are recommended in such cases.

2. Nutritional deficiencies: Conditions such as anemia and hypokalemia can lead to insufficient energy supply and electrolyte imbalance in the body, resulting in leg weakness.

3. Psychological factors: Poor sleep quality and high mental stress can also cause a feeling of leg weakness. Therefore, maintaining good sleep habits and a positive mindset can help alleviate this symptom.

4. Muscle diseases: Conditions such as muscular dystrophy, myositis, and rhabdomyolysis directly damage muscle tissue and impair its contraction function, leading to muscle weakness.

5. Bone and joint problems: For example, arthritis and post-fracture complications. Although these conditions mainly present with pain, long-term joint movement limitations or pain can also lead to decreased muscle strength.

6. Metabolic disorders: Conditions such as hypothyroidism, hypokalemia, and diabetes can indirectly cause muscle weakness by affecting the body's electrolyte balance or energy metabolism.

7. Cardiovascular diseases: Heart failure, severe arrhythmia, and other conditions can lead to inadequate blood supply to the muscles when the heart's pumping capacity declines, resulting in feelings of weakness.