Classification of moderate-intensity overground walking speed in 21- to 85-year-old adults.

Autor/inn/en	Zheng, Peixuan; Ducharme, Scott W.; Moore, Christopher C.; Tudor-Locke, Catrine; Aguiar, Elroy J.
Titel	Classification of moderate-intensity overground walking speed in 21- to 85-year-old adults. Gefälligkeitsübersetzung: Klassifizierung der Gehgeschwindigkeit bei moderater Intensität bei 21- bis 85-jährigen Erwachsenen.
Quelle	In: Journal of sports sciences, 40 (2022) 15, S. 1732-1740 PDF als Volltext Link als defekt meldenVerfügbarkeit
Sprache	englisch
Dokumenttyp	online; gedruckt; Zeitschriftenaufsatz
ISSN	0264-0414; 1466-447X
DOI	10.1080/02640414.2022.2103622
Schlagwörter	Empirische Untersuchung; Forschung; Gesundheit; Gesundheitsförderung; Ausdauertraining; Bewegungsaktivität; Bewegungsintensität; Bewegungsverhalten; Fitness; Walking; Erwachsenenbildung; Analyse; Belastung; Intensität; Klassifikation
Abstract	The Compendium of Physical Activities reports that walking at 2.5 mph associates with absolutely-defined moderate intensity (i.e., )=3 metabolic equivalents [METs]). However, it is unclear whether this speed threshold is accurate during overground walking and/or across the adult age-span. This study aimed to identify optimal and heuristic speed thresholds associated with 3 METs during overground walking across age groups. Healthy adults (n = 248, 21-85 years old, 49% women) performed a 5-minute self-paced overground walking trial. Speed was measured using an electronic gait mat, and oxygen uptake was measured using indirect calorimetry and converted to METs. Optimal and heuristic thresholds and classification accuracy metrics were determined and compared using ROC curve analyses. Speed thresholds (95% CIs) associated with 3 METs for the whole sample, young (21-40 years), middle-aged (41-60 years) and older-aged (61-85 years) groups were 1.29 (1.25, 1.33), 1.30 (1,26, 1,35), and 1.25 (1.21, 1.29) m/s, respectively. Overall, 3 mph and 5 km/h performed better than 2.5 mph and 4.5 km/h in balancing both sensitivity and specificity (higher Youden's Indices). Overground walking speeds associated with 3 METs were similar across age groups. A heuristic threshold of 3 mph or 5 km/h may better identify absolutely-defined moderate intensity overground walking.
Erfasst von	Bundesinstitut für Sportwissenschaft, Bonn
Update	2024/1