I just found an awesome blog post to share with everyone. It's a photo collection of athletes--male and female--that shows a huge range of diversity in body types. This is a really great reference that artists can use to compare and contrast different physiques. As the blog author notes, it's easy to fall into drawing athletic characters the same, but a swimmer doesn't look like a weight-lifter. These photos are a great way to avoid that, and make your characters more unique.
Check it out here.
Merry Christmas to those who celebrate, and best wishes to those who don't.