Which is about half a decade after the usual end of puberty (according to http://en.wikipedia.org/wiki/Puberty#Differences_between_male_and_female_puberty at least) and “happens” to coincide with the age at which I became serious about exercising daily and not eating too much. (Plus, nothing similar happened to any of my recent ancestors AFAIK.)
Genetics can affect any stage of life, and the steady pressure of existing genetics can have effects at a different time. If your informal argument was right, heritability of traits would never increase after puberty; for some things like intelligence, it does increase steadily over a lifetime.
a psychological inability to stick to a calorie limit probably isn’t genetics in the sense you meant.
I wouldn’t necessarily limit these percentages to adding up to 100%. My genetic predisposition to cheat (against limitations but not rules I endorse) has to count for something and helps with body composition much more than nearly anything can. In fact the primary aspect of extreme success in any endeavor that seems to be heavily genetically influenced is that of extreme motivation.
The above said, I really do claim that for the same amount of differentiation from the mean in terms of genetic privilege or differentiation from the mean in control of calories it is the genetics that is the stronger factor.
Counter-claim: 80% of body composition is genetics. (Potentially unfortunate obstacle to be overcome, not an excuse.)
It seems unlikely to me, unless my genes changed a lot over the past couple of years.
Or maybe a certain part of your genetics kicks in at a certain age.
Which is about half a decade after the usual end of puberty (according to http://en.wikipedia.org/wiki/Puberty#Differences_between_male_and_female_puberty at least) and “happens” to coincide with the age at which I became serious about exercising daily and not eating too much. (Plus, nothing similar happened to any of my recent ancestors AFAIK.)
Genetics can affect any stage of life, and the steady pressure of existing genetics can have effects at a different time. If your informal argument was right, heritability of traits would never increase after puberty; for some things like intelligence, it does increase steadily over a lifetime.
a psychological inability to stick to a calorie limit probably isn’t genetics in the sense you meant.
I wouldn’t necessarily limit these percentages to adding up to 100%. My genetic predisposition to cheat (against limitations but not rules I endorse) has to count for something and helps with body composition much more than nearly anything can. In fact the primary aspect of extreme success in any endeavor that seems to be heavily genetically influenced is that of extreme motivation.
The above said, I really do claim that for the same amount of differentiation from the mean in terms of genetic privilege or differentiation from the mean in control of calories it is the genetics that is the stronger factor.