For some people, yes. A firm mattress helps keep the spine aligned for back and stomach sleepers, which can reduce lower back pain caused by excessive sinking. However, for side sleepers, a firm surface can worsen pressure points at the hips and shoulders. A medium-firm mattress is often considered the best choice for back pain across different sleep positions.

Generally yes. Heavier sleepers tend to sink further into softer mattresses, which can reduce support and cause the mattress to wear more quickly. A firm or ultra-firm mattress provides the resistance needed to properly support the body and helps the mattress hold up over time.

Yes. Sam's Club carries firm mattresses in all standard sizes, including queen, king and California king. Members get free shipping on most orders.