Famous fitness instructor Richard Simmons dies at 76-years-old. According to Fox, Simmons was known for his Sweatin’ to the Oldies fitness instruction videos. A Los Angeles Fire Department official said first responders were called to Simmons address for a cardiac arrest. A Los Angeles Police Department official confirmed Richard Simmons death investigation was completed at 10am Saturday, July 13th. Richard Simmons shied away from the spotlight starting a decade ago. I spotted Richard Simmons in an LA airport possibly when I was a child. Rest in Peace Richard Simmons. You will be missed!