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The 3-minute all-out exercise test (3MT) was developed over a decade ago and enables the estimation of time for onset of momentary fatigue for a given speed or power output exceeding critical speed (CS) or critical power (CP), respectively. The 3MT has been validated for conducting high-intensity interval training, used with load carriage prediction and prescription, and validated for shuttle running. These prescriptions are novel because they allow for standardizing exercise intensities relative to metabolic parameters as opposed to a percentage of a given maximum or reserve. Research was identified using leading search engines (e.g., PubMed, Google Scholar, and Research Gate) and citations to similar articles. The objective of this review article was to summarize research that emerged on the CS/CP concept with emphasis on applications since the advent of the 3MT. The review concludes with application of the CS/CP concept to the frequency, intensity, time, and type of exercise for exercise prescription.

Join the 2026 NSCA Training Prescriptions for Overhead Athletes Summit in San Diego on March 28. Learn advanced biomechanics, train hands-on, and earn 0.8 CEUs.

Purchase the 2021 RSCC renewal course. - Achieve a minimum of 70% to renew your RSCC designation and earn 0.5 CEUs towards your certification.

Access the video collection for the 2018 Hammer Strength West Regional Clinic.

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The CASCE Accreditation Review Committee (ARC) is a working committee that reports to the CASCE Board of Directors. The ARC is responsible for comprehensive reviews of programs seeking CASCE accreditation. Members of the ARC synthesize data and information contained in a program’s self-study, site visit report, program response, and progress report to determine compliance with the CASCE Professional Standards and Guidelines. The ARC also makes recommendations to the CASCE Board of Directors regarding accreditation action.

Prepare for your CSPS® with confidence. Explore study timelines and optional NSCA Exam Prep resources — like the textbook, study guide, and practice questions.

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