Those who think they have no time for exercise will sooner or later have to find time for illness. You should try and get at least 30 minutes of physical activity every day. Even brief sessions of activity offer benefits. For example, if you can't fit in one 30-minute walk, try three 10-minute walks instead. The goal is to make regular physical activity part of your lifestyle. Your lunch break and evening strolls around the park are just a few examples when you can go for a walk.