What tool can help to support proper posture while sitting?

A lumbar support pillow is specifically designed to provide support to the lower back, helping to maintain the natural curve of the spine while sitting. It encourages correct posture by filling the gap between the lumbar region and the back of the chair, which can help to alleviate discomfort and reduce the risk of back strain over time. By ensuring that your lower back is adequately supported, a lumbar support pillow aids in promoting a more upright seating position, which is essential for long periods of sitting, especially in desk jobs.

In contrast, the other options do not directly address posture support. A heavy desk weight, for instance, could potentially be used to stabilize items on your desk but has no effect on your posture while sitting. A large monitor might improve visibility and reduce eye strain if positioned correctly, but it does not assist with back support. Lastly, a standard computer mouse does not contribute to posture, as it primarily serves the function of inputting commands rather than supporting the body. Thus, a lumbar support pillow stands out as the most effective tool for enhancing proper sitting posture.