Recently in Australia we had a video of life in an Amazon Tribe, which you probably wouldn't see outside Aus. So I thought you might be interested in seeing it. You see some pretty healthy and muscular looking people, tho the women are not quite as fit looking as the men. They note that there is almost no sickness, but people kill themselves at some point after 30 years old. They also have some very harsh practices.

Amazon's lost tribe - Sunday Night Show Videos - Yahoo!7 News
Amazon's lost tribe - Sunday Night Show Videos - Yahoo!7 News

Note: there is some partial nudity in this.