Marvin is a healthy, active 36-year-old who belongs to a martial arts club. Once a week, he takes lessons in Judo,

 Marvin is a healthy, active 36-year-old who belongs to a martial arts club. Once a week, he takes lessons in Judo, and on the weekends, he participates in local competitions. At his last competition, Marvin was paired with a skilled participant from another club. His rival threw him to the mats, and as Marvin struggled, came down hard to pin him down. Marvin heard a snap, followed by instant pain in his left forearm. Radiographs at the local hospital confirmed that he suffered a transverse fracture of the distal aspect of his left ulna.