Overweight leads to overstress of all weight carrying joints, especially the knee, hip and ankle joints. The consequences of this overstress are early signs of degeneration (osteoarthritis!) linked with pain in the affected joints.
Working at the computer, in itself a physically easy job, has though quite an impact on some parts of the body. It can cause backache and tensions in the neck. It is therefore important to counterbalance and prevent this negative impact.