I am in my 50's, just started TRT, and feel a big difference already. I really need to get back into exercising. I am not overweight, never have been. I have had some old injuries/surgeries in the Army, Plus the Low T all contributed to some muscle loss. Now I am getting burst of energy, and need to work out. What would be best to start out with? Considering I was really in bad shape with the low T. I was thinking water aerobics to start out with? Wow, just thinking back (Long Long Time ago) I use to instruct physical training, and run 18 mile Marathons, but I did not have low T, and was in prime condition. Regardless I think I could build myself up fast, but asking? because I do not need to over do it at this point.