RESEARCH AND PUBLICATIONS
Chester Step research: evidence and limitations.
The Chester Step Test has published validity and reliability evidence. Its result remains an estimate of aerobic capacity, not a direct laboratory VO₂max measurement.
KEY STUDIES
Published evidence, in context.
1995 · Original development
Sykes K. Capacity assessment in the workplace: a new step test. Occupational Health 47(1):20–22. Introduced the workplace test.
2004 · Sykes and Roberts
In 68 healthy adults aged 18–52, the study compared the traditional Chester prediction with direct treadmill VO₂max. Correlation r = 0.92; standard error of estimate 3.9 ml/kg/min. This is not a guaranteed error bound for an individual.
2004 · Buckley and colleagues
An independent study in 13 young adults supported repeatability but questioned aspects of prediction accuracy. Evidence that challenges the method is important too.
2024 · Hart, Taylor and Bishop
In 22 operational firefighters, average underestimation was 1.4 ml/kg/min (about 3%), with wider individual agreement: approximately ±12.2 ml/kg/min. Be cautious near occupational thresholds.
RESEARCH LIBRARY
Further guidance and population-specific research.
Clinical research supports specific uses and does not automatically validate the original healthy-adult VO₂max equation for every population. The Cartwright Fitness review also discusses COPD and type 1 diabetes research.
INTERPRETATION
Consistency matters. So does professional judgement.
Heart-rate measurement, step height, cadence, stage timing, stopping rules, medication, participant technique and population differences can all affect interpretation. Material changes to the method can weaken its connection to published evidence.
Direct respiratory gas analysis remains the reference method when precise individual VO₂max measurement is required. A required occupational benchmark belongs to the organisation’s standard, not a universal Chester Step pass score.
Read the full evidence review
Use the evidence with the right practical setup.
Explore guided testing and reporting while keeping protocol suitability and professional judgement central.
The official Chester Step Test software, equipment and practitioner resources.
Software
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The Chester Step Test and Treadmill methodologies are the IPR and copyright of Professor Kevin Sykes. Associated software, including CST2, is copyright Cartwright Fitness Ltd 2013–2026. All rights reserved.