En intressant studie.
av J Zhejiang Univ Sci. 2003 Mar-Apr;4(2):236-40.
"The purpose of this study is to gain understanding of the relationship between ejaculation and serum testosterone level in men. The serum testosterone concentrations of 28 volunteers were investigated daily during abstinence periods after ejaculation for two phases. The authors found that the fluctuations of testosterone levels from the 2nd to 5th day of abstinence were minimal. On the 7th day of abstinence, however, a clear peak of serum testosterone appeared, reaching 145.7% of the baseline. No regular fluctuation was observed following continuous abstinence after the peak."
Om man inte runkar på en vecka ökar testosteronet med 150 %.