What safety measure can help prevent back strain while using a computer?

Choosing to adjust the chair position is a crucial safety measure to prevent back strain while using a computer. Proper ergonomic setup of a chair ensures that the user maintains a healthy posture, which is essential during prolonged sitting. An adjusted chair helps support the natural curvature of the spine and allows for feet to be flat on the floor, with knees at a right angle. This position minimizes the risk of developing musculoskeletal problems associated with poor posture.

While the other options also contribute to overall comfort and reducing strain, they do not address the immediate need for proper alignment and support that an adjusted chair provides. For example, standing desks and regular exercise breaks can enhance physical activity levels, but they do not specifically target the positioning of the body at the workstation. Frequent stretching can help alleviate tension but may not be a preventive measure if the fundamental issue of chair position isn't addressed first. Therefore, adjusting the chair to fit the user’s body is vital for preventing back strain.