Well since the old thread got deleted and no one knows who it is, or the person doesn't want to say it. I'm starting it back for the people interested.
"Chinese researchers conducted a study in 2003, and enlisted twenty-eight male volunteers to abstain from ejaculation for a period of one week. The participants were tested daily for deviations on serum testosterone levels. The Chinese study was the first to measure the influence of ejaculation frequency on serum testosterone levels, and the results are provocative.
Researchers found that abstaining from ejaculation for six days had no impact on serum testosterone levels. On the seventh day, serum testosterone levels peaked to 145.7% of baseline, and then declined rapidly on the eighth day.
Researchers believe testosterone declined on day eight from the negative feedback suppression of Leutinizing hormone secretion. Leutinizing hormone is essential for testosterone production, and LH determines free testosterone levels. Suppression of LH would decrease serum testosterone levels, returning them to baseline. The study determined that the frequency of sexual activity and ejaculation impacted testosterone levels"
Info taken from: http://www.bodybuilding.com/fun/south99.htm
Well, what you have to remember from this is that if you have an important match, you might want to restrain yourself from any sexual activity the week before. (ex: you have an important game tuesday, the tuesday the week before up to AFTER the game is finished.)
The 2 studies:
Jiang M. Periodic changes in serum testosterone levels after ejaculation in men. Sheng Li Xue Bao 2002 Dec 25;54(6):535-8
Jiang M, Xin J, Zou Q, Shen JW. A research on the relationship between ejaculation and serum testosterone level in men. J Zhejiang Univ Sci. 2003 Mar-Apr;4(2):236-40.
What do you guys think?