headfairy
We moved to Canada three years ago, and they have outdoor play down to -20 in elementary schools. 
That said, the dc's do have pe everyday. But sometimes this randomly seems to consist of walking round the field. Soccer is big for girls and boys. But most things are expensive, just as elsewhere.
I now live in a town which appears to have the highest per capita number of Olympians at any one time (save London at the mo, lol). You trip over them in the street, they are always in and out of the schools waving their medals, and they are generally much more visible. Sport is everywhere. On any weekend in the summer, there are any number of triathlons, running and bike races (off road and road). We have a purpose built trail system which is well maintained, and there are runners and athletes everywhere. It's just a fact of life.
It is pretty niche here though. And of course most people train year round but their main competitive sport is winter stuff. (ice) hockey is huge, but because of where we live, there is a huge amount of ski training (both downhill and cross country) and a big ice skating community. Kids will get up early early to head to the rink before school for training. It's an accepted feature of life.
How many parents in the uk would get their kids up at 5 to get them to the rink for an hour traing before school? (and then spend every weekend driving through blizzards for hours to get to matches?) it's definitely cultural. It's very obvious here, because of the sheer amount of sport going on.
In an aside, I went to uni in the uk to train to become a pe teacher, because I was completely passionate about the sport being accessible to everyone. I hated the way preteen and teen girls were essentially expected to skive off and buy fags, because they were so disenfranchised from the power and strength of their bodies. I lasted two terms, by which point the ethos of the course had driven me to despair. It was sheer elitism, to the extent that we were not expected to smile during gym periods as it meant we weren't't taking it seriously enough. I assume things have changed, but I see no difference in the opening up the enjoyment of sport and physical activity to anything other than a few.
I love where we live. Even dd2, who has cp, swims, hikes, bikes, plays golf, tennis, skis, and takes dance classes, all at out of school facilities with instruction.
I have three kids, and am permanently skint, however. The vast majority of our expendable income goes on activities. Tis a choice, though.