Funny thing happened to me with the marathon runner challenge. In my legacy, the third generation heir was one of a pair of twins, and there was also a sister about 4 sim days older than the twins. Well, the heir had the astronaut lifetime wish, so she had athletic skill maxed and I had her complete the marathon runner challenge. She died at 92 days. Her twin sister didn't kick off until she was 105 days, and her older sister outlived her, too. Neither of them were fitness hounds or vegetarians.