Ejaculation does not alter testosterone levels.

thanks for your reply

to whom it may concern:

http://www.bodybuilding.com/fun/south99.ht m
http://www.ncbi.nlm.nih.gov/pubmed/1250632 9

ejaculation seems to affect testosterone levels

however I could not conclude if and how ejaculation and/or sexual stimulation would affect athletic performance

That is just one study based on 28 men over only a week. Not enough data to actually say anything yet.

At this point, there is no known link between ejaculation and athletic performance- except that a regular and healthy sex life supports heart health, which obviously supports athletic performance.

Also, the small temporary changes within the body in testosterone levels are not known to have an impact on athletic performance.

So if anything, maintaining regular sexual activity is best for overall health.