Thank you Luan for putting movement over self improvement.
Self-improvement is a trend and a wave. Both will come crashing.
The particularity of a wave : crest and trough.
There is a limit on how much you can improve before it becomes counter productive.
And the self-improver is judge, jury and executioner.
That is the conundrum of self - improvement.
Best case scenario : you reach your goal, so what?
There will always be a higher mountain to climb.
Don't strive to improve. Strive to move into a better version of yourself today compared to yesterday. Until you die.