I know of several medical colleagues over the years, including doctors, nurse practitioners, and physician assistants, who seriously injured themselves (or worse) in terrible accidents related to high-risk recreational activities shortly after they graduated from their intense educational programs.
Be careful out there!
Here is a general framework. Try to beat it of course.
20s: unless pro athlete. Do not go into competitive rec leagues/skiing/snowboarding - injury risk/reward horrific
30s: should be done with alcohol in general. Special occassion fine
40s: should not be renting out your time