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J Sci Med Sport. 2017 Nov;20 Suppl 4:S104-S108. doi: 10.1016/j.jsams.2017.08.009. Epub 2017 Aug 24.

The Pandolf equation under-predicts the metabolic rate of contemporary military load carriage.

Author information

1
Land Division, Defence Science and Technology Group, Australia. Electronic address: jace.drain@dst.defence.gov.au.
2
Deakin University, Geelong, Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Australia.
3
Land Division, Defence Science and Technology Group, Australia.

Abstract

OBJECTIVES:

This investigation assessed the accuracy of error of the Pandolf load carriage energy expenditure equation when simulating contemporary military conditions (load distribution, external load and walking speed).

DESIGN:

Within-participant design.

METHODS:

Sixteen male participants completed 10 trials comprised of five walking speeds (2.5, 3.5, 4.5, 5.5 and 6.5km·h-1) and two external loads (22.7 and 38.4kg).

RESULTS:

The Pandolf equation demonstrated poor predictive precision, with a mean bias of 124.9W and -48.7 to 298.5W 95% limits of agreement. Furthermore, the Pandolf equation systematically under-predicted metabolic rate (p<0.05) across the 10 speed-load combinations. Predicted metabolic rate error ranged from 12-33% across all conditions with the 'moderate' walking speeds (i.e. 4.5-5.5km·h-1) yielding less prediction error (12-17%) when compared to the slower and faster walking speeds (21-33%).

CONCLUSIONS:

Factors such as mechanical efficiency and load distribution contribute to the impaired predictive accuracy. The authors suggest the Pandolf equation should be applied to military load carriage with caution.

KEYWORDS:

Energy cost; Load carriage; Metabolic rate; Military personnel; Predictive equation

PMID:
28919496
DOI:
10.1016/j.jsams.2017.08.009
[Indexed for MEDLINE]

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