Validity of the Training-Load Concept

Louis Passfield*, Juan M. Murias, Massimo Sacchetti, Andrea Nicolo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Training load (TL) is a widely used concept in training prescription and monitoring and is also recognized as as an important tool for avoiding athlete injury, illness, and overtraining. With the widespread adoption of wearable devices, TL metrics are used increasingly by researchers and practitioners worldwide. Conceptually, TL was proposed as a means to quantify a dose of training and used to predict its resulting training effect. However, TL has never been validated as a measure of training dose, and there is a risk that fundamental problems related to its calculation are preventing advances in training prescription and monitoring. Specifically, we highlight recent studies from our research groups where we compare the acute performance decrement measured following a session with its TL metrics. These studies suggest that most TL metrics are not consistent with their notional training dose and that the exercise duration confounds their calculation. These studies also show that total work done is not an appropriate way to compare training interventions that differ in duration and intensity. We encourage scientists and practitioners to critically evaluate the validity of current TL metrics and suggest that new TL metrics need to be developed.

Original languageEnglish
Pages (from-to)507-514
Number of pages8
JournalInternational Journal of Sports Physiology and Performance
Volume17
Issue number4
DOIs
Publication statusPublished - Apr 2022
Externally publishedYes

Keywords

  • athletic training
  • endurance training
  • exercise performance
  • exercise physiology
  • exercise training

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