I have read mix reviews on it and friend of mine said Jujutsu or Judo is fun but will wreck you body. And Jujutsu being worse will wreck your joints he said because of all the joint locks. That getting thrown to a mat every night at 3x a week for over a decade can cause back pain or a sniff neck. All the pains and aches of the back and neck. And it will wreck your knees, especially if you do a lot of competition. And you can get osteoartheritis on all your fingers and wrist because of the joint locks. And pinched nerve in your neck or back. I thought Jujutsu or Judo was better on your knees than Taekwondo and some of the kung fu or some of the karate that are very big on very high kicks, spinning kicks,rounded kicks, jumping kicks and flying kicks and such that will have more toll on your knees and can destroyed the cartilage in your knees over time.