Mountain bicyclists are subject to various traumatic and overuse injur
ies, Traumatic injuries range from minor abrasions and contusions to w
rist fractures, shoulder injuries, and concussions, Helmet use is impo
rtant in preventing serious head trauma, Many overuse injuries stem fr
om improper bike fit, anatomic malalignments, and training errors, Tre
atment includes adjustments to the bike and modification of training h
abits, Included are tables regarding a variety of malalignments, relat
ed overuse injuries, and suggested bicycle adjustments, A companion ar
ticle (page 71) provides guidance for doctors and patients on proper b
ike fit.