Properly manufactured and correctly managed, our instruments and tools can last a long time without breaking down. The same cannot be said about the owners and makers of these things. Man, as a psycho-physical instrument, breaks down with a surprising regularity and facility. Witness for example, back pain, which, as the clich d expression has it, reaches epidemic proportions. It has been called 'the curse of the age' and is responsible for many days, sometimes months, of time off work.
Patients often complain about back pain triggered by gardening, playing golf, playing tennis, etc.
When, because of a bad back, playing becomes a drag, something must be seriously wrong in the great scheme of life. So, Man physically breaks down easily. It certainly is. Figure 3 Bending forward the wrong way. The hips are not sufficiently flexed.