[bulek]

Counterpoint: Epigenetics is a thing, which is influenced by the parents life style.

https://en.wikipedia.org/wiki/Epigenetics_of_Human_Developme... https://sciencing.com/epigenetics-definition-how-it-works-ex...

>Other studies have looked at the effect of famine. When mothers were exposed to famine during pregnancy, as was the case in Holland in 1944 and 1945, their children had a higher incidence of obesity and coronary disease compared to mothers not exposed to famine. The higher risks were traced to reduced DNA methylation of a gene producing an insulin-like growth factor. Such epigenetic effects can be inherited over several generations. >Exposure of parents to cocaine may affect memory.

I can't find evidence of it, but it seems reasonable to extrapolate that long term life style choices will also affect epigenetics for the better.

[keiferski]

There have been similar studies on male fitness level at the time of conception.

There is growing scientific evidence in human and animal studies that should inspire every father-to-be to start exercising more and eating healthier before conceiving a baby. A wide range of studies have found that fathers who are obese at the time of conception pass on a predisposition to their children and grandchildren to be overweight, to develop diabetes, or both.

https://www.psychologytoday.com/us/blog/the-athletes-way/201...

[Tenoke]

Most of those high-level epigenetics findings are on shaky ground.

Even if true that their children had higher rates of obesity this could easily be due to nurture - e.g. those Mothers could've been more likely to stock up on food at home and feed their children more due to the trauma, with the methylation explanation being post-hoc.