Studying the literature you will find that diseases of the skeletal system are greater when compared with other kinds of diseases. Furthermore this sickness needs on average a longer recovery time. Primarily the back pain is directly related to age on the one hand and the profession (hard working people are more often sick than the others) on the other hand. The work load by lifting weights should be limited in relation to working capacity and anatomic differences between men and women, adults and youngsters and also within the group of men