Tennis
I am interested in tennis because it may be one of the best ways to learn how to lead yourself before you have to lead anybody else.
The point is not to go professional
I came across a line attributed to Patrick Mouratoglou that roughly says: your child is unlikely to become a professional tennis player, but far more likely to carry what sport teaches them into a leadership position.
The exact numbers attached to the quote are repeated more confidently than they are sourced. But the underlying idea is the reason I find tennis interesting. Going professional is an unlikely outcome. Learning to make decisions, recover from mistakes and take responsibility for what happens next is useful almost everywhere.
Tennis teaches you to lead yourself
In a team sport, somebody else can rescue a bad decision. In tennis, there is nowhere to hide. You choose the shot, live with the result and then have a few seconds to get ready for the next point.
That is leadership in a very small loop: make a plan, read what is in front of you, act with incomplete information and adjust when reality disagrees with you. And you have to do it without turning one bad point into five.
You make decisions before you know the answer
The ball does not arrive with instructions. You read your opponent's position and movement, remember what happened before and commit to a response, often before the ball has crossed the net.
Research on professional returners found that they combine tactical context with cues from an opponent's movement. Basically, they do not wait until they have perfect information. They learn what matters, decide and move. Research on returning serve and anticipation.
Lose the point. Start again.
This may be the most useful lesson. You can make the right decision and still lose the point. You can build a lead and watch it disappear. The next serve does not care.
So tennis does not teach you to avoid mistakes. It teaches you to stop making the last mistake the explanation for the next one. Research with competitive tennis players has found a positive relationship between mental toughness and resilience, and a negative relationship between mental toughness and stress. That does not prove tennis created those qualities. But it explains why the court reveals them so quickly. Mental toughness, resilience and stress in tennis.
Why I want to keep playing
I want to get better at staying clear when tired, changing a plan without panicking and competing without becoming tense. Tennis gives you an honest score, but the more interesting result is how you behaved while earning it.
And unlike many demanding sports, it is something you can keep doing for decades. That gives you a long time to find out whether the lessons actually stick.