Richard Simmons, the legendary fitness guru known for his energetic personality and popular workout videos, has died at the age of 76. Simmons passed away at his Los Angeles home on Saturday morning, July 13, a day after celebrating his birthday. Emergency responders pronounced him dead at the scene, and no foul play is suspected. Simmons gained fame in the 1980s with his 'Sweating to the Oldies' exercise series and became a beloved figure in the fitness community. TMZ first reported the news.