Fernandez-Gamez, BeatrizPulido-Muñoz, ÁlvaroOlvera-Rojas, MarcosSolis-Urra, PatricioCorral-Pérez, JuanMorales, Javier S.Jiménez-Pavón, DavidMora-Gonzalez, Jose2025-03-132025-03-132025-01Physiotherapy Research InternationalOpen AccessVolume 30, Issue 1January 2025 Article number e700101358-2267https://repositorio.unab.cl/handle/ria/63765Indexación (Scopus)The objective of this paper is to quantify muscle load using Theraband elastic bands across seven resistance intensities. Methods: Bands were profiled using a force sensor, standardized to 200 cm length, and manually stretched. Measurements for each band were twice recorded at 11 distances and converted to percentages for standardization. Results: Equations derived from Theraband resistance properties were established (kg = ((elastic constant) ± SE) × percentage of elongation). The standard error ranged from 0.0007 to 0.069, while the coefficient of determination ranged from 0.977 to 0.995. Conclusion: This study provides quantification of resistance across various intensities of Theraband elastic band, offering equations for estimating external load.en-USelastic constantspersonalized trainingphysical exerciseresistance exercisestrength trainingArtículo10.1002/pri.7001010.1002/pri.70010