alllstar skrev:Har du nogensinde afholdt dig fra at dyrke sex, fordi du skulle ud og løbe stærkt dagen efter? Hvis ja, har du med stor sandsynlighed snydt dig selv for en hyrdetime helt uden grund. For meget tyder nemlig på, at sex måske ligefrem kan forbedre din præstation.

http://www.lobnu.dk/traening/dyrk-sex-og-loeb-hurtigere

In contrast, although plasma testosterone was unaltered by orgasm, higher testosterone concentrations were observed following the period of abstinence. These data demonstrate that acute abstinence does not change the neuroendocrine response to orgasm but does produce elevated levels of testosterone in males.

The purpose of this study was to determine the changes in sex hormone level in men after ejaculation. The serum testosterone concentrations of 28 male volunteers were investigated daily during abstinence period after ejaculation. We found that fluctuations of testosterone levels from day 2 to day 5 of abstinence were minimal. On day 7 of abstinence, a peak of serum testosterone appeared, reaching 145.7% of the baseline (P<0.01). After the peak, no regular fluctuation was observed. Ejaculation was the premise and beginning of the 7 days' periodic phenomenon. If there was no ejaculation, there was no periodical changes in serum testosterone level. These results indicate that the periodic change in serum testosterone level is caused by ejaculation.