Old Man Jiu Jitsu
Same as young man Jiu Jitsu ... only, sometimes, we limp off the mat.
I have said it before, and zI'll keep saying it - my personal strategy as a 'mature-age' BJJ Athlete is simple - Denial!
Just pretend you're 25 years old - and get to that mat. Training as if you are younger keeps you younger. It's that simple. Staying in shape is all about attitude.