Albrecht Jensen, Massage & Exercises Combined (1920)
“ It must be remembered that by the strongest pressure is meant the strongest that one is able to exert upon oneself. Let us take, for example, two persons of widely different physical strength, such as a powerful wrestler and a little girl of about ten years of age. If the wrestler uses the strongest pressure possible for him to exert, that pressure would not be harmful to him (provided, of course, that he has had no recent injuries) , since his body is proportionately strong. ”
