The ability to lift heavy weights, run, swim or workout in the gym may well improve your overall fitness level.
But this kind of fitness is not what we want in tai chi training.
A student must learn how to use their body in a very different way. The body
needs to become agile, flexible, adaptive, sensitive and strong.
Conventional training will not necessarily improve your tai chi.
Many exercises actually create muscle tension, and tension impedes the natural
movement of the muscle itself.