Aiki (2002)

When a promising young boxer is crippled in a car accident, he falls into a life of dissipation and depression. No boxing ring or martial arts club will take him on -- that is, until an aiki jujitsu master helps the young man develop techniques uniquely tailored to a wheelchair. What starts off as a sad film revs up into an exciting and fun series of epiphanies in which the young man realizes his situation isn't as hopeless as it seems.