The test–retest reliability of physiological and perceptual responses during treadmill load carriage

Purpose Understanding the test–retest reliability of physiological responses to load carriage influences the interpretation of those results. The aim of this study was to determine the test–retest reliability of physiological measures during loaded treadmill walking at 5.5 km h −1 using the MetaMax...

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Bibliographic Details
Published in:European journal of applied physiology 2024-07, Vol.124 (7), p.2093-2100
Main Authors: Vickery-Howe, Danielle M., Dascombe, Ben J., Clarke, Anthea C., Drain, Jace R., Huynh, Minh, Middleton, Kane J.
Format: Article
Language:English
Subjects:
Adult
Biomedical and Life Sciences
Biomedicine
Cardiovascular system
Exercise Test - methods
Exercise Test - standards
Female
Fitness equipment
Heart rate
Heart Rate - physiology
Human Physiology
Humans
Male
Metabolism
Military Personnel
Occupational Medicine/Industrial Medicine
Original
Original Article
Oxygen Consumption - physiology
Perception - physiology
Physical Exertion - physiology
Physiology
Reproducibility of Results
Respiration
Sports Medicine
Walking
Walking - physiology
Weight-Bearing - physiology
Young Adult
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Summary:Purpose Understanding the test–retest reliability of physiological responses to load carriage influences the interpretation of those results. The aim of this study was to determine the test–retest reliability of physiological measures during loaded treadmill walking at 5.5 km h −1 using the MetaMax 3B. Methods Fifteen Australian Army soldiers (9 male, 6 female) repeated two 12-min bouts of treadmill walking at 5.5 km h −1 in both a 7.2 kg Control condition (MetaMax 3B, replica rifle) and a 23.2 kg Patrol condition (Control condition plus vest) across three sessions, separated by one week. Expired respiratory gases and heart rate were continuously collected, with the final 3 min of data analysed. Ratings of Perceived Exertion and Omnibus-Resistance Exercise Scale were taken following each trial. Reliability was quantified by coefficient of variation (CV), intra-class correlation coefficients (ICC), smallest worthwhile change (SWC), and standard error of the measurement. Results Metabolic and cardiovascular variables were highly reliable (≤ 5% CV; excellent-moderate ICC), while the respiratory variables demonstrated moderate reliability (
ISSN:1439-6319
1439-6327
1439-6327
DOI:10.1007/s00421-024-05435-0