For about 10 years, I trained Brazilian jiu-jitsu three times a week—a consistent level, if one you’d still consider recreational. Sure, there were times when an injury or work got in the way, but for the most part I found myself tussling with other weekend warriors on a regular basis.
source https://vitals.lifehacker.com/how-can-i-get-back-in-shape-after-a-long-time-off-1846782952