Which of the following posture tips aids in preventing back pain while sitting?

Using a chair with good lumbar support is crucial for maintaining a healthy posture while sitting, which in turn helps in preventing back pain. The lumbar region of the spine is naturally curved, and a chair that provides support to this area helps to maintain the spine's natural curvature. This alignment reduces strain on the back muscles, ligaments, and discs during prolonged periods of sitting.

Good lumbar support encourages the spine to stay in an optimal position, which can minimize the risk of discomfort and injuries that arise from poor posture. It aligns the spine properly and promotes a more upright position, which facilitates better blood circulation and reduces fatigue. In contrast, chairs without adequate lumbar support can lead to a slouched position, increasing the likelihood of back pain over time.

Other posture tips, such as the positioning of the chair in relation to the table or sitting cross-legged, do not provide the same level of structural support needed to protect the lumbar spine during prolonged sitting. Additionally, being slightly hunched is generally counterproductive for spinal health, as it can increase tension and stress on the back muscles. Prioritizing ergonomic seating that includes lumbar support is a fundamental practice in preventing back pain when sitting.