[Physical activities and bone mass in women].

The mechanism and its effects on the bone mass are discussed. The bone disorders of spacemen show the necessity of physical constraints. The intensive physical exercise can increase disturbances in the bone remodeling.

Lumbar spine, sport and actual treatment.

Low back pains are very frequent in athletes by microtraumatisms and sudden efforts. The prolapse of the nucleus pulposus is created. After the failure of correct medical treatment, some new technics give good results: chemonucleolysis, trans-cutaneous nucleotomy, microdiscectomy.