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heart rate deflection


Definition: A downward or upward change from the linear heart-rate-work relationship observed during exercise testing with incremental resistance. It indicates the anaerobic threshold, (i.e., the lactic acid threshold) at which lactic acid as metabolic by-product starts to accumulate in the body during exercise.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.