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. Author manuscript; available in PMC: 2014 May 1.
Published in final edited form as: J Hum Evol. 2013 Mar 5;64(5):448–456. doi: 10.1016/j.jhevol.2013.01.014

Figure 3.

Figure 3

Cost for a 10 km trip as a function of travel speed, travel time and frontal load level: 0% (A), 8% (B), and 16% (C) of body mass. Cost curves were generated from aggregate (n = 20) CoT equations for each loading level and cover the range of reasonable walking speeds. Average body mass for participants was 63.9 kg.