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- W2102596914 abstract "Testosterone supports male reproduction through a broad range of behavioral and physiological effects, including the maintenance of sexually dimorphic muscle used in male-male competition. Although it is often assumed that a persistent relationship exists between men's testosterone production and musculature, most studies either fail to find evidence for such a relationship, or document very weak associations. In nonhuman primates, by contrast, correlations between testosterone and muscle mass are higher. Here, we propose the Paternal Provisioning Hypothesis, which predicts that men's skeletal muscle is less dependent on the effects of androgens than that of other primates, and more sensitive to the physical demands of men's work. This permits human fathers to downregulate testosterone, which has negative impacts on pair-bonding and parenting effort, but without sacrificing the strength and musculature necessary to provision mates and offspring.We tested predictions of the Paternal Provisioning Hypothesis by assessing parental status, salivary testosterone levels, anthropometry, and strength among 122 men (ages 18-78) at the Mogielica Human Ecology Study Site in rural Poland. We chose this population because men practice subsistence agriculture, regularly engaging in physically demanding labor. Grip and chest strength were assessed using a dynamometer, and upper-body musculature was estimated from arm muscle circumference.In this population, testosterone showed no association with measures of strength or musculature, and was lower in older men and pair-bonded fathers. Marital and parental status and workload, by contrast, were positive predictors of muscle mass and strength measures.These findings offer support for the Paternal Provisioning Hypothesis." @default.
- W2102596914 created "2016-06-24" @default.
- W2102596914 creator A5024273439 @default.
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- W2102596914 creator A5046180162 @default.
- W2102596914 creator A5054894612 @default.
- W2102596914 creator A5087201179 @default.
- W2102596914 date "2015-06-29" @default.
- W2102596914 modified "2023-09-30" @default.
- W2102596914 title "The Paternal Provisioning Hypothesis: Effects of workload and testosterone production on men's musculature" @default.
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