Richard Simmons gives rare update on 75th birthday, nearly a decade after retreat from public eye

Richard Simmons, fitness mogul and health advocate, celebrated his 75th birthday, and offered a rare update since his retreat from the public eye in 2014.

Simmons has not been seen in public since 2014, and his withdrawal from the public eye has sparked rumors and concern from fans.

There were allegations in 2016 that Simmons was being held hostage by his housekeeper, which Simmons denied in a phone interview on "Today."