Rocha Fernandes Furniture, January 07th , 2018. f you find you are not sleeping well it may be due to an old and uncomfortable bed. How much time we spend in bed can affect its durability. If the mattress is lumpy and the springs are too bouncy it might be time to go shopping. We also change as we age. A person who has once slept best on a soft mattress may be more suited to a harder mattress later in life, or, vice versa. Weight gain and weight loss can all effect how we react to our mattresses. A mattress might be perfect for one person but if two people start using it there could be difficulties. Studies have shown that beds can lose up to 70% of their original hardiness over 10 years. How Do I Select a Mattress?