A lay explanation at https://www.nih.gov/news-events/news-releases/nih-study-find.... This is simply the first I found.
If you are able to understand this literature I am quite confused as to how you can't find it yourself -- the associations go far deeper, with increased fat intake causing plaque buildup that eventually leads to heart problems. Obesity under class III also shortens life expectancy.
Realize also that per what is laid out in that review someone who is 6" ~180lbs is obese, even if it mostly muscle. Even if it is obesity caused by muscle instead of fat, you don't live as long.
