I think TA has helped with my arm definition. Sometime over the last year I started doing the unweighted mat arm work as an add-on -- tried to do it nearly every day. I was doing mostly other barre workouts at the time, I think, but would throw in more traditional work once in a while. It was the first time I ever remember seeing nice definition in my arms. I'm trying to get back to being a little more consistent with that -- I'm suffering from too many workouts and wanting to do everything, but I do believe that between TA and chatarunga pushups, nice arm definition is possible!