India, Oct. 31 -- Phones get upgraded every couple of years. Wardrobes get refreshed every season. Yet the one thing people lie on for roughly a third of their lives often goes unchanged for fifteen years. The mattress deserves better attention than it gets. The rule of thumb: replace a mattress every 7 to 10 years.

Body weight, sleeping position, and daily care all shift the timeline, and India's humidity can speed up wear in poorly ventilated rooms. The science backs this up. Research published in Applied Ergonomics found that people who moved from old mattresses to new ones reported less back pain and better sleep quality. A tired mattress can quietly drag down an entire day, and over the years, an entire lifestyle. In an interview wi...