How can a Mattress Affect your Back, Posture and Digestive System? Our quality of sleep depends a lot on the quality of our mattress. According to a research, 90 % of people feel that quality of the sleep totally depends on the mattress they are sleeping on. If you are using a very old mattress, it could create some problem with your health. Every individual’s requirement might vary according to his/her health issues like weight gain, chronic back pain, allergies, etc.