American fitness guru Jack LaLanne died Sunday afternoon at his home in Morro Bay, California, according to his long-time agent, Rick Hersh. He was 96.

The cause, said Hersh, was respiratory failure due to pneumonia. LaLanne had been ill for the past week. His wife, Elaine, was at his side, along with his family and friends, Hersh said. No funeral arrangements were announced, but his agent said plans were being made.