1. Slow blood circulation: Prolonged sitting in the same position, especially lack of activity, can lead to slow blood circulation in the lower limbs, insufficient blood supply to muscles, resulting in muscle fatigue, soreness, and weakness.
2. Uneven muscle tension and relaxation: When sitting, some muscle groups may be in a tense state for a long time, while others are relatively relaxed. This uneven tension and relaxation state can easily lead to muscle fatigue and soreness.
3. Nerve compression: Prolonged incorrect sitting posture may lead to nerve compression, such as sciatic nerve compression, which can cause numbness, soreness, and other sensations in the legs. Long term exposure to inappropriate pressure on the spine may also affect nerve conduction, further exacerbating soreness and weakness.