Poor posture can negatively affect overall health by leading to musculoskeletal pain, particularly in the back and neck. It alters body alignment, which can result in muscle strain and discomfort. Additionally, poor posture may hinder lung capacity and reduce breathing efficiency, leading to fatigue and decreased energy levels. Prolonged periods of improper alignment can also affect organ functionality. Addressing and correcting poor posture through exercises and adjustments can improve health and well-being significantly.