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BRYCE HASTINGS

Head of Research, Technical Advisor

Bryce Hastings drives the science behind the sweat, leading world class research that shapes how millions of people train. Working alongside internationally renowned research partners, Bryce bridges the gap between the lab and the gym floor, ensuring every LES MILLS™ program is safe, effective, and powered by science.

He has developed numerous research programs and co authored reports across a range of fitness and scientific publications. These include the landmark Get Fit Together trial, alongside research into core conditioning, high intensity interval training, and exercise strategies for sedentary individuals.

A certified Physical Therapist since 1986, Bryce’s academic work is supported by extensive hands on experience. He owned a private practice within the original Les Mills World of Fitness in Auckland and holds an Advanced Diploma in Manipulative Therapy and a Master of Philosophy from Auckland University of Technology, where he serves as a Research Associate and lectured part time for eight years.

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Articles by Bryce

Does exercise help you lose weight? What the science really says
Bryce Hastings
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August 11, 2026

Does exercise help you lose weight? What the science really says

Exercise alone may not lead to major weight loss, but it plays a critical role in heart health, muscle maintenance, metabolism, and long-term weight management.

Endurance vs Intensity: The new science says go harder, but don’t ditch the long run
Bryce Hastings
Exercise
July 14, 2026

Endurance vs Intensity: The new science says go harder, but don’t ditch the long run

New research suggests exercise intensity may play a meaningful role in reducing chronic disease risk. Explore the benefits of HIIT, endurance training, and how to balance both for better health.

Forget exercise guidelines
Bryce Hastings
Gesundheit
July 19, 2021

Forget exercise guidelines

Bryce Hastings highlights the flaws with current exercise guidelines and reveals that much less exercise than recommended can offer the same benefits.

Running and joint health
Bryce Hastings
Fitness
November 27, 2020

Running and joint health

Inactivity is more likely to wear out your knees than running marathons. Find out how going for a run or jog can improve your joint health.

THE RIGHT AND WRONG WAY TO SIT
Bryce Hastings
Gesundheit
August 1, 2020

THE RIGHT AND WRONG WAY TO SIT

New insights suggest we consider saying goodbye to chairs for good. Changing the way we sit could be key to ridding the health dangers associated with sedentary behavior.

Les Mills Groupness Study
Bryce Hastings
Forschung
September 11, 2019

Les Mills Groupness Study

The Les Mills Lab team recently partnered with Penn State University’s Dr Blair Evans to further investigate the group effect.

LIFTING WITHOUT BULKING
Bryce Hastings
Fitness
April 10, 2018

LIFTING WITHOUT BULKING

Myth busting with Bryce Hastings: Lifting weights will not get you big and bulky, in fact, developing muscles is key to getting lean, fit and healthy.

PHYSIOLOGICAL AND HORMONAL RESPONSES TO BODYPUMP STUDY
Bryce Hastings
Forschung
April 1, 2018

PHYSIOLOGICAL AND HORMONAL RESPONSES TO BODYPUMP STUDY

This study delved into how people’s physiological and hormonal responses to two different kinds of workouts compared, even when the calories burned were exactly the same.

MODERN HUNTER GATHERERS
Bryce Hastings
Gesundheit
December 18, 2017

MODERN HUNTER GATHERERS

A neurological expert highlights the physical, mental and social activity that improves brain function, and the best leisure activities for mental strength.

THE TYRANNY OF THE BATHROOM SCALES
Bryce Hastings
Gesundheit
December 18, 2017

THE TYRANNY OF THE BATHROOM SCALES

Monitoring your weight is not the best way to measure the health benefits of exercise. Learn how it is a false indicator, and might even be bad for you.

Are you ready to HIIT it?
Bryce Hastings
Fitness
December 18, 2017

Are you ready to HIIT it?

Find out if high-intensity interval training is right for you, and the best way to incorporate HIIT into your weekly training regime.

SHOE SABOTAGE
Bryce Hastings
Gesundheit
December 18, 2017

SHOE SABOTAGE

Learn how wearing high heels for prolonged periods impacts your ability to perform squats and impact exercises and can increase injury risk.

Exercise and pregnancy
Bryce Hastings
Schwangerschaft & Kind
December 18, 2017

Exercise and pregnancy

Safety and science are at the core of all Les Mills programs. Read our advice on how to stay healthy and active during your pregnancy.

HOW TO OFFSET DOWNTIME
Bryce Hastings
Fitness
December 18, 2017

HOW TO OFFSET DOWNTIME

Research shows regular exercise doesn’t prevent the detrimental effects of being inactive for long periods. Bryce Hastings explains actions you can take to undo time spent sitting.

BARBELLS VS BODY WEIGHT
Bryce Hastings
Fitness
December 18, 2017

BARBELLS VS BODY WEIGHT

Discover the strength-building benefits of body weight exercises, how to advance your body weight exercises and the best approach to building strength.