After years of dedication to judo it gave me a black belt (first dan) and unparalleled skills at taking anyone down. It also gave me: 1) Osteoartheritis on all my fingers from GI gripping 2) Pinched nerve in my neck 3) Bad lower back from not wanting to fall on my back and lose by Ippon. 4) Destroyed cartilage in my knees because of some throwing techniques like uchimata That sport is probably the most tough on the joints ever, and to be competing in it will add 60 years to your body. My brother retired from judo at 29. TWENTY NINE! He walks like yoda because of hip surgery. The nature of the sport is geared to demolish you like no other if you want to stay serious in Judo.