With a background in Yoshukai karate from 25yrs ago I started BJJ about 3 years ago with my son who is now 18. Next year after he goes to college I plan on picking up Karate again, but after 1 broke leg and 2 torn minscus due to BJJ/Judo . I am trying to decide on Tang Soo Do or Shotokan. My question is after watching the TSD forms I see a lot of spinning and jumping kicks in the belt testing. I am far from crippled but I dont want to repeat a injury. Any one here with bad Knees who is older and still in TSD? BTW I am a 49 year old grandad. Thanks BJJDAD.