[Injury and overuse pattern in professional ballet dancers]. / Verletzungen und Uberlastungserscheinungen im professionellen Ballett.

AIM: The purpose of the study was to show the injury profile and common discomforts of professional ballet dancers and to examine factors that affect the frequency of the injuries, like age, gender, regeneration activities. METHOD: 42 female and 35 male dancers in German theaters were evaluated by a questionnaire, training observation, and physical examination. RESULTS: Common discomfort was described frequently in the lumbar spine (88%), the knee (80.5%), and the ankle (74%). 285 injuries occurred in the female, 282 in the male dancers during a 5-year period. The most frequent injuries were muscle strains and inflammations, mostly of the lower extremity (64%) and the torso (24%). Gender differences were found in shoulder injuries, which occurred in 9% of cases in men, compared to 2.5% in women. 73% of the injuries considered as severe were traumatically caused when performing jumps and lifts. Severe overuse injuries were mostly found in the lower extremity and the lumbar spine, caused by technical deficiencies. 54% still suffered from the consequences of the injury by returning pain, swelling or instability. CONCLUSION: This high amount of injuries can be reduced by continuous technical improvement, the use of auxiliary material like joint-protectors or mats and enough time for regeneration.

[Experiences with lumbar disc herniations in adolescents]. / Erfahrungen mit lumbalen Bandscheibenvorfällen bei Jugendlichen.

AIM: Lumbar disc herniation is rare in adolescents and often misread. The difference of etiology, symptoms and therapy in comparison to adults were investigated and the long-term outcome of conservative and surgically treatment evaluated. METHOD: We analysed informations obtained from the medical records of 51 patients younger than 20 years with 79 lumbar disc herniations. For the long-term follow-up we prepared a questionnaire composed of general questions about the patient's lifestyle, pain level and remaining symptoms. RESULTS: The average period from the beginning of the symptoms to the finding of the right diagnosis took about 14,3 months. We compared disc herniations in adolescents with the current literature of disc herniations in adults and found differences in etiology and symptoms. In 16 % of our patients the beginning of the pain was associated with a trauma, in 12 % the pain began during sports activity (microtrauma). In 49 % we found radiological signs of spinal aberrations. Low back pain and monoradicular sciatica were the main complaints, but findings of neurological deficits were rare. 27 patients were managed conservatively and 24 surgically. On the day of discharge 94 % of patients reported excellent or good results. The outcomes of the follow-up period were similar in both treatment groups. Almost all patients were able to attain a normal activity level and few reported restrictions of their daily life. The success rate of the pain frequency was 85 % and pain intensity was 81 %. CONCLUSION: The etiology of lumbal disc herniations in adolescents has a multifactoral basis. Conservative treatment should be pursued as a mainstay of treatment. Only if conservative treatment fails, surgical treatment should be considered.