Originally Posted by tlm
How about high level of intensity then? The exact level of talent is not that important, even good 3.5 players need to be able to avoid injuries as they get older. The subject is about playing tennis for a lifetime.
Many people I know till the 4.5 level have not had any injuries, in spite of playing 3 times a week and not doing any exercise other than stretching. They range in age from 35 to 70.