Validity of Galaxy Watch for Estimating Energy Expenditure During Intermittent Running: Cross-Sectional Study
Alexandre Reis Pires Ferreira, Allan Inoue, Ramon Ludman Martins Barbosa, Cassio Hayek, Mateus Reis, João Arthur Alcântara, Augusto Hirao Shigueoka, Marcelo Rodrigues dos Santos

TL;DR
This study found that Samsung Galaxy Watch 6 and 7 models provide reasonably accurate estimates of energy expenditure during intermittent running, though they are not perfectly precise.
Contribution
The study validates the moderate accuracy of Galaxy Watch 6 and 7 for measuring energy expenditure during intermittent running exercises.
Findings
No statistically significant differences were found between Galaxy Watch models and indirect calorimetry for energy expenditure.
Spearman correlations and intraclass correlation coefficients indicated moderate agreement between the devices and the gold standard.
Mean absolute percentage error ranged from 10.10% to 12.55% for the Galaxy Watch models.
Abstract
Smartwatches have gained popularity for their potential to provide accurate measurements of various physiological parameters. However, the validity of energy expenditure (EE) across different smartwatch models remains a topic of ongoing investigation. Discrepancies between results obtained from different models and gold standard methods are particularly critical across varying exercise intensities and types, as validation studies have demonstrated overestimation when wearable activity monitors are compared with indirect calorimetry. This study investigated the accuracy of 2 versions of the Samsung smartwatch (Galaxy Watch [GW] 6 and 7) in measuring EE during intermittent moderate-intensity running exercises, using indirect calorimetry as the gold standard method. This study included 148 healthy adults, comprising 80 men and 68 women. Participants performed intermittent treadmill…
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Taxonomy
TopicsPhysical Activity and Health · Sports Performance and Training · Cardiovascular and exercise physiology
