Better and In good shape

Better adjective - (comparative of `good') superior to another (of the same class or set or kind) in excellence or quality or desirability or suitability; more highly skilled than another.

In good shape and better are semantically related. In some cases you can use "In good shape" instead an adjective "Better".

Better and in good shape are semantically related. Sometimes you can replace term "Better" with "In good shape", this terms are similar.