Forearm and wrist fractures in mountain bike riders

To identify the different types of fractures of the forearm caused by mountain bike accidents, and to assess the physical and social consequences of these injuries.

All the forearm fractures recorded in the Wellington Hospital fracture logs between July 1992 and July 1994 were reviewed in December 1994. Mountain bike accidents were identified in 37 patients. 11 patients could not be contacted and one patient declined participation, leaving 25 patients who participated in the study. Those who took part each completed a questionnaire and were examined. The radiographs of each patient were also reviewed.

Nine of the fractures occurred in the proximal third of the forearm and 16 occurred in the distal third. The most common fracture was that of the radial head (9). When functionally assessed 15 patients were graded excellent, 5 satisfactory, 4 unsatisfactory, and 1 patient was graded as poor. The average time off work was 28 days, with no change of occupation being necessitated in any of the patients. Eight patients had to make changes to their recreational activities.

The results of the study suggest that mountain bike accidents can result in significant injury. With adequate medical attention it appears that the majority of cases recover well, and experience only minimal discomfort without significant long term physical and social consequences.