Originally Posted by CdCf
1. How many would have even periodic access to either snow or sand? Not many, I'd think.
2. Define "very muscular". I've found that women tend to overestimate their own muscularity, probably because women aren't expected to have larger muscles.
1. If they get snow in Arizona periodically, I would think anyone north of there would have snow relatively regularly. Up here in Canada we can count on it for 5 or 6 months of the year. As for sand, you can find it at any beach ... either at the ocean or at your local lake. Some rivers even have sandy shores. Walking on roads with thick gravel would do the trick too. Anywhere where the walking surface isn't solid ... where the surface gives and takes a bit more concentration to get your footing.
2. I used to be a body-builder. Almost three years of body-building didn't develop my calves like 6 months of walking with heavy boots in the snow.