Thanks for using health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
Thats a myth and concerta
doesn't have any significant effect on your testosterone
levels. It will not impair your body building. Infact use of stimulants will improve your attention and will help you in planning your time for weight aerobics
Hope I am able to help you,
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.