Researchers publish a compendium for estimating mechanical work in high-intensity functional training
A new compendium for high-intensity functional training (HIFT) proposes standardized estimates of positive external mechanical work across common exercise modalities. Its estimates could help coaches compare and monitor workloads, but they are not validated direct measurements and do not capture metabolic stress.
Frontiers in Sports and Active Living published a review on Oct. 27 presenting standardized methods for estimating positive external mechanical work in high-intensity functional training (HIFT). The proposed equations cover weightlifting, plyometrics, calisthenics, gymnastics and continuous modalities including rowing, cycling, skiing and running.1
The compendium addresses about 50 exercises or variations, with a primary focus on movements appearing in the CrossFit Open. The estimates use simplified biomechanical models, published movement standards and average anthropometric data, and the paper provides examples for calculating work and work rate in selected workouts.1
The authors said the calculations are standardized estimates, not direct measurements, and have not been validated against criterion measurements of mechanical work. They said coaches could use the estimates to compare workout demands and monitor workloads across training cycles, but the figures do not directly measure metabolic stress or fatigue.1
