Something for the future, not now.
What if stats could be improved using the gym/library.
Or… the gym was NEEDED to maintain them? Not logged time in the gym for a month? You lose a stat point on endurance.
Logged in the gym? You can gain a maximum of one point in three real months (need to log x amount of time)
Really, stats shouldn’t be so fixed, because RP should be able to change them. Even if it balanced them elsewhere.