LaLanne, who was a keen bodybuilder and owned a chain of gyms, passed away on 23 January (11) after suffering respiratory failure due to pneumonia.
Friends, family and a number of famous faces turned out to pay their last respects to the late star in a service at Forest Lawn memorial park in L.A., and among the speakers was Schwarzenegger, who trained with LaLanne when he first moved to America from his native Austria.
The bodybuilder-turned-movie star told the congregation, ""Right now he's telling St. Peter, 'Get up at 6am, get a juicer, take some vitamins, do some stretching'... Can you imagine the number of lives Jack saved? He was a true saint.""
Lou Ferrigno also spoke at the service and called LaLanne ""the godfather of fitness"", while fellow fitness star Richard Simmons paid a poignant tribute to his late pal by ordering the crowd to put their arms in the air and stretch, adding: ""That's how we honour Jack, with a big stretch"".