Adult beginners are not late children
A coach who teaches an adult beginner using a method designed for children almost always loses them within a season. Not because the method is wrong, but because the adult in the room is solving a different problem.
An adult who is starting tennis at forty, or piano at fifty-five, or running at sixty, is not catching up. They are starting something they have decided to start, often with a clear sense of what they want from it and a much less patient relationship with looking incompetent. The work of the first three months is as much about the relationship to the work as it is about the work itself.
A good adult beginner programme respects three things that a children’s programme can largely ignore: the ego of an accomplished adult who is suddenly bad at something, the body that has lived for several decades and does not move like it used to, and the limited windows of time in a busy week. A coach who designs around these three constraints tends to keep adult beginners for years; a coach who pushes through them tends to lose them by month four.