I gennemsnit har mænd 61% mere muskelmasse end kvinder, hvilket er relateret til højere niveauer af testosteron. Større muskelmasse kan føre til flere parringmuligheder, men også øgede diætmæssige behov og nedsat immunfunktion. Data viser, at muskelvolumen er en betydelig indikator for antallet af seksuelle partnere og energiforbrug, samt negative effekter på immunmålinger.
Titel på undersøgelse:
Costs and benefits of fat-free muscle mass in men: relationship to mating success, dietary requirements, and native immunity
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Hele abstrakt på originalsprog:
On average, men have 61% more muscle mass than women (d=3), a sex difference which is developmentally related to their much higher
levels of testosterone. Potential benefits of greater male muscle mass include increased mating opportunities, while potential costs include
increased dietary requirements and decreased immune function. Using data on males aged 18–59 years from the third National Health and
Nutrition Examination Survey and including other relevant variables, fat-free mass (FFM) and/or limb muscle volume (LMV) are significant
predictors of the numbers of total and past-year self-reported sex partners, as well as age at first intercourse. On the cost side, FFM and LMV
are strong positive p