Metabolic equivalent of task (METs) thresholds as an indicator of physical activity intensity

The purpose of the study was to identify and compare validity parameters of different absolute intensity thresholds in METs, using relative intensity classification as criterion measure. Convenience sampling was used to recruit total of 112 adults. The participants carried out an incremental maximal...

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Bibliographic Details
Published in:PloS one 2018-07, Vol.13 (7), p.e0200701-e0200701
Main Authors: Mendes, Márcio de Almeida, da Silva, Inácio, Ramires, Virgílio, Reichert, Felipe, Martins, Rafaela, Ferreira, Rodrigo, Tomasi, Elaine
Format: Article
Language:English
Subjects:
Adult
Adults
Analysis
Biology and Life Sciences
Chronic illnesses
Criteria
Energy Metabolism - physiology
Epidemiology
Exercise
Exercise - physiology
Exercise Test - methods
Female
Fitness
Heart rate
Humans
Male
Medicine
Medicine and Health Sciences
Metabolic Equivalent - physiology
Metabolism
Middle Aged
Nutritional status
Oxygen
Oxygen Consumption - physiology
Oxygen uptake
Parameter identification
Physical activity
Physical education
Physical Endurance - physiology
Physical fitness
Physical Fitness - physiology
Physical Sciences
Physiological aspects
Physiology
Science
Social Sciences
Sports medicine
Thresholds
Time Factors
Validity
Young Adult
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Summary:The purpose of the study was to identify and compare validity parameters of different absolute intensity thresholds in METs, using relative intensity classification as criterion measure. Convenience sampling was used to recruit total of 112 adults. The participants carried out an incremental maximal cycle ergometer test and asked to perform nine free-living activities. The oxygen uptake was measured by a VO2000® gas analyser throughout the tests. The intensity thresholds were identified using Receiver Operator Characteristic (ROC) curve analysis, having relative intensity categories as criterion measure. A total of 103 participants attended the two visits. Among 54 men and 49 women, the mean (± SD) ages were 36.1 (± 11.1) and 33.9 (± 10.6) years, respectively. The intensity thresholds identified were 4.9 METs for moderate and 6.8 METs for vigorous physical activity. In conclusion, the physical activity thresholds, generated according to the entire sample, were higher and presented improved specificity when compared to thresholds currently recommended. Moreover, these parameters presented relatively high accuracy, even when applied to specific groups such as sex, age, nutritional status and physical fitness.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0200701