The cause of death of fitness icon Richard Simmons is currently under investigation, with no foul play suspected. Simmons, known for his motivational speaking and weight loss programs, passed away on Saturday. The Medical Examiner's Office has deferred announcing the cause of death, leading to speculation and further testing to be conducted. After rising to fame in the 1980s, Simmons had a successful career in fitness and authored several books. His sudden retreat from the spotlight about a decade ago led to rumors, including allegations that he was being held against his will. However, Simmons denied these claims. His brother described his passing as a shock, having spoken to Simmons just days before his death. Despite his absence from the public eye, Simmons remained in contact with his fans through phone calls and emails. His last post on Facebook expressed gratitude for the birthday wishes he had received.