Les Mills is a chain of health clubs in New Zealand that has changed how the world does group fitness. Les Mills was the first to realize there was a market for formatted group fitness classes that provide a consistent, effective, & FUN workout experience. On this episode of All About Fitness, Bryce Hastings, the Science Director for Les Mills, pulls back the curtain and shares how Les Mills designs the workouts and conducts the research that makes thousands of people around the world get sweaty every day.

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