Les Mills, the founder of Les Mills International and an Olympian, dies at the age of 91, according to reports from BBC News and Yahoo Sports. The company is widely known for producing choreographed group fitness workouts set to music, which have become popular internationally.

Les Mills’ brand includes signature programmes such as “Body Pump” and “Body Combat”, both of which are designed around structured routines performed in class settings. Across outlets, the focus is on the lasting global presence of the Les Mills workout format and its influence on modern group exercise.

While the sources provided do not include detailed circumstances of his death, they agree on his role in building Les Mills International and on his status as an Olympian. The reports also highlight how the workouts associated with the brand—developed under his leadership—have become recognizable by their music-led choreography and standardized class structure.