Fitness training

Hi!

I'm working on learning proper footwork for moving to the next ball, but I find it very hard on my legs, and in the second half of my training session I am too tired to do it well. I decided that I am not fit enough for the proper footwork.  I am not fat or anything specially bad, just that I didn't play any sport for some years, and I have a quite sedentary life. To recover some fitness, I started to go out running regularly.

I wonder, if beside running, other exercises could be useful for table tennis. For example, is it useful if I also do some sideways shuffling? And some squats? Can you think about other useful exercises? Should I take care only of my legs, or should I also do something for my upper body? How would you organize a 45 min - 1 hour training session outdoor?

Thank you very much for your very useful website!