Arm wrestling can cause serious injuries, including spiral fractures of the humerus (upper arm bone).
A spiral fracture occurs when a bone breaks by twisting.
A drawing of a spiral fracture
Arm wrestling takes a combination of strength and skill.
World Champion Irina Gladkaya (8:05, start at 0:32, watch to 1:35)
Schoolboy vs. Whole Gym in Dubai (3:04)
20-Year-Old Arm Wrestling Champion (5:03)