Nick Tiller (MRes, Ph.D.) is a researcher at the Institute of Respiratory Medicine & Exercise Physiology at Harbor-UCLA, and a board member of the Pulmonary Education and Research Foundation (PERF). He is an author, science writer, and skeptical activist. Nick was born in London, England, and now resides in Los Angeles, CA. 

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in health and fitness!

The global health and fitness industry is worth an estimated $4 trillion. Lax regulations have led to commercial products that are sold on exaggerated claims and unconvincing evidence-for-efficacy. In The Skeptic's Guide to Sports Science, Tiller puts the industry's most popular sports products and practices under the microscope, but also delivers a treatise on critical thinking and scientific skepticism that is compulsory reading for exercisers, athletes, academics, students, and practitioners operating in today's lucrative health & fitness industry.

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Tiller NB, Elliott-Sale KJ, Knechtle B, Wilson PB, Roberts JD, Millet GY. (2021). Do sex differences in physiology confer a female advantage in ultra-endurance sport? Sports Medicine; 51(5), 895-915.

Tiller NB, Turner LA, Hart J, Casaburi R. (2020). Airflow dynamics and exhaled-breath temperature following cold-water ingestion. Respiratory Physiology & Neurobiology; 284, 1-6.


Callender NA, Hart PW, Ramchandani GM, Chaggar PS, Porter AJ, Billington CP, Tiller NB (2020). The exercise pressor response to indoor rock climbing. Journal of Applied Physiology; 129(2), 404-409.

Tiller NB, Stewart GM, Illidi CR, Levine BD. (2020). Exercise is medicine? Cardiorespiratory implications of ultra-marathon running. Current Sports Medicine Reports; 19(8), 290-297. Invited review

Tiller NB, Campbell IG, Romer LM. (2019). Mechanical-ventilatory responses to peak and ventilation-matched upper- versus lower-body exercise in normal subjects. Experimental Physiology; 104, 920-931.

Tiller NB, Roberts JD, Beasley L, Chapman S, Pinto JM, et al. (2019). International Society of Sports Nutrition Position Stand: nutritional considerations for single-stage ultra-marathon training and racing. Journal of the International Society of Sports Nutrition; 16(1), 50. ~30 k accesses

Tiller NB, Campbell IG, Romer LM. (2017). Influence of upper-body exercise on the fatigability of human respiratory muscles. Medicine & Science in Sports & Exercise; 49(7), 1461-1472.

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Tiller NB, Rossiter H, Abbasi A, Kinninger A, Budoff M, Casaburi R, Adami A. (2020). Relationships among muscle oxidative capacity, coronary artery calcium, and hepatic steatosis in COPD. European Respiratory Society annual congress (Vienna, Austria), European Respiratory Journal: Sept 2020 - Volume 56 - Issue 64.

Tiller NB, Turner LA, Hart J. (2020). Exhaled-breath temperature and spirometer airflow dynamics following cold-water ingestion in healthy subjects. American College of Sports Medicine annual congress (San Francisco, CA),  Medicine & Science in Sports & Exercise: July 2020 - Volume 52 - Issue 7S - p 806.

Stewart GM, Fermoyle CC, Wheatley-Guy CM, Robach P, Constantini K, Tiller NB et al. (2020). Extravascular lung water and lung diffusing capacity in response to ultra-endurance exercise performed at moderate altitudeAmerican College of Sports Medicine annual congress (San Francisco, CA), Medicine & Science in Sports & Exercise: July 2020 - Volume 52 - Issue 7S - p 774.

Tiller NB, Turner LA, Taylor BJ. (2019). Alterations in pulmonary and respiratory muscle function in response to 10 marathons in 10 daysAmerican College of Sports Medicine annual congress (Orlando, FL), Medicine & Science in Sports & Exercise: May 2018 - Volume 50 - Issue 5S - p 122.

Tiller NB, Chiesa SC, Roberts JD, Turner LM, Jones S, Romer LM. (2019). Integrative physiological responses to a 25-day ultra-endurance exercise challengeAmerican College of Sports Medicine annual congress (Orlando, FL), Medicine & Science in Sports & Exercise: June 2019 - Volume 51 - Issue 6S - p 254-255.

Tiller NB, Campbell IG, Romer LM. (2016). Expiratory muscle fatigue following upper-body exercise in healthy humans. Proceedings of the Physiological Society 35 (Nottingham, UK, The Biomedical Basis of Elite Performance: March 2016 - PC60.

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‘How to be a skeptic in sports science’

The Koopcast

‘The Skeptic’s Guide to Sports Science’

That Triathlon Show


‘Respiratory physiology essentials for exercisers and athletes’

GlaxoSmithKline Human Performance Lab

Ultra-marathon nutrition for training and racing

The KoopCast


‘Physiological responses to a 24-hour cycling challenge’

Global Cycling Network

The extreme challenges of ultra-marathons

Inside Science


Nutritional considerations for single-stage ultra-marathon training and racing

We Do Science


‘Red Bull: The physiology of an elite climber’

Pioneer Television


‘Nina and the Neurons’

BBC Television



BBC Television


‘Fitness for motor-racing’

Eurosport Television


‘The Human Body’

BBC Television

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