Hard mattresses are not popular to buy because many believe they are uncomfortable. However, contrary to their bad reputation, there are some advantages of the hard mattress over soft ones.

A mattress that is too soft causes the body to sink into a curved position, which can lead to back problems in the long run. With hard mattresses, the body lies straight and is supported equally everywhere. However, the mattress should be soft enough to allow the shoulders and hips to lie comfortably.

Especially for overweight people, a mattress that is too soft puts one-sided strain on the body. This can lead to sleep disorders and joint problems. The hard mattress ensures balanced weight distribution and prevents the one-sided load.

Babies should never sleep on a mattress that is too soft. If the baby turns onto its stomach, there is a risk that the nose and mouth will sink and the baby will not get enough oxygen if the mattress is too soft. 

Those who often toss and turn in their sleep or like to sleep on their side should choose a medium-firm mattress, because a mattress that is too firm can be uncomfortable and lead to sleep interruptions.