Energy cost of load carriage at various speeds
- Does anyone have good data on the energy costs of load carriage at low
Based on a model developed by the US military, a researcher in Australia
estimates that the power output involved carrying 60 kg at 2.5 kph in the
'real world' is about 400 watts. Based on treadmill studies we have
conducted, my estimate is about 550 watts for this activity conducted on the
Because it is likely that overground walking will involve some hill climbing
too, I would expect the field situation to lead to a power output closer to
600 watts than 400 (assuming our lab data are correct).
The researcher also says that 'I have a USA paper that documented a 20 km
march with soldiers carrying 46 kg in just over 5 hours which comes to about
These figures (~400 watts) seem to be too low, especially for a load of 46
kg carried at 4 kph.
Can anyone shed any light on this, please.
Defence Nutrition Research Centre
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Phone: Int + 61 3 6352 6607 (03 6352 6607 in Australia)
Fax: Int + 61 3 6352 3044 (03 6352 3044 in Australia)
The opinions expressed in this message are those of the author and
should not be taken to represent the official position of the Defence
Science and Technology Organisation or of the Australian Department of
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