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Title: The energetics of walking on sand and grass at various speeds
Authors: MacKinnon, Scott Netson 
Davies, Simeon 
Keywords: Compliance;Energetics;Grass;Sand;Walking
Issue Date: 2006
Publisher: Taylor & Francis
Abstract: This study investigated the energetics of walking on sand and grass. Fourteen adult males, participated in the study. Participants had a mean age of 34.6 years old, 72.6 kg in mass and 172.5 cm in stature, who walked at 3, 4, 5, 6 and 7 km per h on sand and grass surfaces. Physiological measures included heart rate, O2 uptake, CO2 exhalation, ventilation and relative O2 uptake using a MetaMax Ergospirometer. Speed was controlled in a methodology similar to the 'Multistage 20-m Shuttle Run Test'. Data were collected during physiological steady rate at each determined speed. A minimum of 2 h rest was enforced between randomized conditions. Results indicate that there was a significant increase (p < 0.01) in all,easured physiological indices indicative of energy expenditure when walking on sand compared to grass at 3-7 km per h, with the greatest disparity between the surfaces (ratio = 1.63 in O2 consumption at 5 km per h.
Appears in Collections:BUS - Journal Articles (DHET subsidised)

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