Fitness guru Richard Simmons died Saturday at the age of 76, his representative and law enforcement sources confirmed to multiple media outlets. Simmons, a best-selling author and star of millions of exercise videos - including the Sweatin' to the Oldies” line - had just celebrated his birthday on Friday. He had posted a thank you on social media for all of the messages he'd received, less than 24 hours before his death. MORE: https://www.wthr.com/article/news/nation-world/fitness-guru-richard-simmons-dead/507-1963563c-d5c0-44e9-8ffe-b76d04909118