Obviously this polling is done from a Americana/Europa point of view but outside it, there's less emphasis on macho maleness, which seems to be what muscularity is alluding to, in fact it hurts you. Women are diverse and so are there preferences but its probably harder to see it in macho, male driven image in the American continent.
It appears that especially in the American/European continent, muscularity, the ability to exert physical violence, justified or not, is what is preferred, which tells you a bit about those societies, violence and fear appears to be a component of their culture, especially true in Americas compared to Western Europe for instance.
However, it's obvious that the new generation has a very different standards for male beauty. The popularity of BTS is a good example. It just shows you how much of an impact media has. Japanese women for the most part prefer the thin skinny androgyny according to polls, in fact androgyny in males is highly preferred over the macho masculinity or less threatening looking males, which says a bit about those societies which are far far safer and non-violent compared to North America. At the same time there is casual physical contact that is generally accepted but you don't walk in the streets at night in large cities and fear for your life.