Les Mills Research

In a world where people are constantly bombarded by conflicting and confusing advice about fitness, evidence-based programs stand out amongst the clutter and differentiate industry leaders.

Significant investment in ongoing research is an important part of Les Mills’ business, and enables our club partners and their members to know that our group fitness programs are effective and safe. Read more.

“We’ve been revolutionizing the group fitness industry for the past 37 years and our scientifically-proven exercise techniques play a big part in that. It’s our commitment to quality research that means we can continue to create life-changing fitness experiences for exercisers across the globe.”

- Phillip Mills, CEO

Our Research

  • The effects of CXWORX on quality of life study

    The effects of CXWORX on quality of life study

    University of New England, USA, November 2017

    Participation in regular CXWORX improves quality of life and reduces stress. Find out more

    Published in The Journal of the American Osteopathic Association.

  • THE TRIP study

    THE TRIP study

    Penn State, USA, June 2017

    An immersive cycling environment delivers high intensity training without high perceived effort in beginners. Find out more

    Published in the Medicine and Science in Sports and Exercise Journal.

  • BORN TO MOVE study

    BORN TO MOVE study

    Edge Hill University, UK, August 2016

    BORN TO MOVE™ increases motivation, enjoyment and fitness in 10 – 11 year olds. Find out more

    Published by BMC Public Health.

  • group fitness instructor injury survey

    group fitness instructor injury survey

    Penn State, USA, June 2016

    Published abstract: Gottschall, J. S., Hastings, B. (2016). The ACSM physical fitness guidelines for cardiovascular, strength, and flexibility training minimize overuse injury in group fitness instructors. Find out more

    Medicine and Science in Sports and Exercise, 48, 673. doi:10.1249/01.mss.0000487021.61198.dd

  • Developing/testing a motivating communication style

    Developing/testing a motivating communication style

    Curtin University, Australia, June 2016

    A motivational coaching method based on the Self Determination Theory is effective in increasing motivation and adherence in RPM™. Find out more

    Published in the Scandinavian Journal of Medicine and Science in Sports.

  • LES MILLS SPRINT study

    LES MILLS SPRINT study

    Penn State, USA, April 2016

    Six weeks of LES MILLS SPRINT™ increases cardiovascular fitness and body composition in moderately active adults.Find out more

    Published in the Journal of Fitness Research.

  • BODYPUMP and bone density study

    BODYPUMP and bone density study

    Penn State, USA, September 2015

    BODYPUMP™ is shown to be effective at increasing bone density in healthy adults. Find out more

    Published in the Journal of Bone Health and Metabolism.

  • LES MILLS GRIT and visceral adiposity study

    LES MILLS GRIT and visceral adiposity study

    University of Nicosia, Cyprus, January 2016

    Eight weeks of LES MILLS GRIT™ improves body composition and fitness in active adults. Find out more

    Published in the Journal of Sports Medicine and Physical Fitness.

  • RPM effect study

    RPM effect study

    Loughborough University, UK, August 2015

    Eight sedentary participants completed eight weeks of RPM™ with significant changes observed in cardiovascular and metabolic health markers.Find out more

    Published in the Journal of Fitness Research.

  • BODYPUMP squat study

    BODYPUMP squat study

    Penn State, USA, April 2015

    The BODYPUMP™ Rep Effect is an effective strength and conditioning tool. Find out more

    Published in the Journal of Fitness Research.

  • The effect of BODYBALANCE on middle-aged adults study

    The effect of BODYBALANCE on middle-aged adults study

    University of the Sunshine Coast, Australia, November 2014

    Twelve weeks of BODYBALANCE™/BODYFLOW® improved balance and functional performance in middle-aged and older adults. Find out more

    Published in Clinical Interventions in Aging.

  • The effect of BODYPUMP on middle-aged adults study

    The effect of BODYPUMP on middle-aged adults study

    University of the Sunshine Coast, Australia, July 2014

    BODYPUMP™ is shown to be an effective strategy to improve strength and gait speed in healthy adults aged 55 plus. Find out more

    Published in the Journal of Science and Medicine in Sport.

  •  LES MILLS GRIT soccer study

    LES MILLS GRIT soccer study

    Penn State, USA, April 2014

    LES MILLS GRIT can be an effective protocol for soccer players and may maximize competition performance while minimizing training time. Find out more

    Published by the Journal of Fitness Research.

     

  • LES MILLS GRIT study

    LES MILLS GRIT study

    Penn State, USA, March 2014

    Six weeks of LES MILLS GRIT™ increases fitness and reduces cardiovascular risk in active individuals. Find out more

    Published by the Open Journal of Preventative Medicine.

  • CXWORX study

    CXWORX study

    Penn State, USA, March 2013

    Integration core exercises such as hovers and planks are found to increase muscle activation and provide a more effective training stimulus than isolated exercises such as crunches. Find out more

    Published by the Journal of Strength and Conditioning Research.

  • Get Fit Together study

    Get Fit Together study

    Penn State, USA, December 2012

    Thirty weeks of Les Mills’ classes reduces cardiovascular risk in sedentary individuals. Find out more

    Published by the Open Journal of Preventative Medicine.

Our Team

Bryce Hastings, Head of Research

Technical Advisor, Les Mills International

Bryce is literally the brains behind the brawn, leading ground-breaking research and collaborating with internationally-renowned research partners to unearth the latest and most effective fitness techniques.

Drawing from this research and his time in the fitness lab, Bryce ensures that every LES MILLS™ program is safe, effective and grounded in science.

Conducting research such as the ‘Get Fit Together’ trial and studies into the LES MILLS GRIT™ program, Bryce has illustrated how Les Mills’ programs dramatically decrease fat percentages, lower dangerous cholesterol and triglyceride levels, and contribute to more effective fitness routines. The research not only provides important insights into methods of fitness training, it also offers invaluable evidence and solutions to address growing global government concerns over rising obesity levels.

Bryce became a certified Physical Therapist in 1986 and completed his Advanced Diploma in Manipulative Therapy (AUT University Auckland) in 1990. He serves as a Research Associate at Auckland University of Technology and lectured part-time there for eight years. In 1990, Bryce opened his private physical therapy practice at Les Mills World of Fitness in Auckland, the original Les Mills gym established in 1968 by Les Mills Senior.

He has co-developed research programs on core conditioning, high-intensity interval training and exercise strategies for sedentary individuals, and he has co-authored reports in a variety of fitness and scientific publications.

Dr Jinger Gottschall, Associate Professor

Penn State University, U.S.A

Dr Gottschall earned her doctoral degree in integrative physiology from the University of Colorado at Boulder and furthered her academic career as a postdoctoral fellow in neurophysiology at the Emory School of Medicine.

She is currently an associate professor at The Pennsylvania State University with a research focus on the effectiveness of various exercise regimes.

Dr Gottschall is a passionate advocate for physical activity and has dedicated her career to finding programs that promote balanced, healthy lifestyle choices while delivering the results they promise.