Assessment of physiological, biomechanical and structural correlates of age-related differences in the aerobic demand of walking of young females

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Mitchell Wells Craib (Creator)
The University of North Carolina at Greensboro (UNCG )
Web Site:
Don W. Morgan

Abstract: The purpose of this study was to assess the collective influence of selected metabolic, gait, and morphological variables on age-related differences in the submaximal aerobic demand (VO2) of walking. Four age groups of seven females (ages 6,10,13 and 18 or 19) comprised the sample. Measurements of walking VO2, ventilatory equivalent, and step frequency at 1.56 m sec-1 and 0% grade, were obtained at 10-min intervals during three treadmill testing sessions totaling 70 minutes. Sitting metabolic rate was assessed over a 10-min time period following 10 min of seated rest. Limb morphology (thigh to shank ratio) was determined from measurements of limb volume using a water fill plethysmograph. Average vertical ground reaction forces and ground contact time were measured as participants walked across a force platform at 1.56 m-sec-1. Body surface area to mass ratio was predicted from knowledge of body height and mass. Analysis of variance (ANOVA) and Tukey post-hoc multiple comparison procedures were used to assess whether mean values of the dependent (walking VO2) and independent variables (ventilatory equivalent, step frequency, resting metabolic rate, limb morphology, average vertical ground reaction force, ground contact time and body surface area to mass ratio) were significantly different across age groups.

Additional Information

Language: English
Date: 1995
Gait in humans
Walking $x Physiological aspects

Email this document to