 We will carry out the study in eight elderly care wards across England. We will first study the wards for up to 6 months. Then, half of the wards will have the new floor laid. Wards will be chosen to receive the new floor, or remain with a standard floor, by chance. The new floor has shock-absorbent properties. We will study all the wards for another 12 months. This will allow us to compare the new flooring with the normal flooring. 