I'm over 40, and not doing too bad. If you love the movements, it will make all the difference. I honestly feel younger than ever thanks to the system.
Bro ... I am 40, I just started learning the system after 9 years of traditional BJJ, age is not a factor, just go for it, yesterday
at an open mat session I pulled an electric chair sub, an old school pass, and was close to getting to the truck, if I can do this, no doubt you can too.
Technique is everything. Stretching is key for life, not just jiu jitsu but I think people think 10th Planet requires more flexibility than it actually does. I'm constantly inspired by guys older than me and I'm 37.
I'll Be 40 in a couple months. I trained gracie system back in 1996 for a minuet and then picked jiu jitsu back up again in 2015. It was then I learned about 10P, and once I started learning it I loved it. Especially the 10P community. I have more problems with my short legs keeping me from some of the moves, but flexibility isn't much of a problem for me. If you can do full butterfly and sit in full lotus I'd say that's pretty darn good. As for it being a "young mans game", that's not true at all. I roll with younger guys all the time and I can hang. Don't let age discourage you at all man. Good Luck!!
I have to think that it's a hard question to answer.
What does good mean? I'm 36 and a new blue belt. I wish I had started earlier. But I reckon when I'm 46, if I don't quit, I'll be wrecking 20 year olds. I just won't be destroying at ADCC.
I started at 45 and got my blue belt at 48. I have plenty of issues (past surgery on wrist, ankle and toe) plus soft tissue issues like most of us but I feel that jiu jitsu helps me with these injuries rather than prevent them. I competed a couple of times last year and have no problem rolling hard with folks much younger than me. A few things that I have learned along the way: don't let your ego get in the way and not tap, even to the much younger guys. I did not learn that at first and kept getting injured, which really prevented me from getting better. I also make sure my body gets what it needs in turns of nutrition, physical therapy (I see an ART therapist about 2x a month). Also, the mental aspect is huge. Sometimes the body can't do the things it wants to do as strongly or quickly as I want them to but in time, technique wins out.