# Accuracy of Metabolic Cost Predictive Equations During Military Load Carriage

Vine, C., Coakley, S. L., Blacker, S. D., Doherty, J., Hale, B. J., Walker, E. F., Rue, C. A., Lee, B. J., Flood, T. R., Knapik, J. J., Jackson, S., Greeves, J. P. and Myers, S. D.et al
(2020)
*Accuracy of Metabolic Cost Predictive Equations During Military Load Carriage.*
Journal of Strength and Conditioning Research.
ISSN 1064-8011

Vine et al.2019_The Metabolic Cost of Load Carriage_JSCR_2020 FINAL.docx - Accepted Version

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## Abstract

To quantify the accuracy of 5 equations to predict the metabolic cost of load carriage under ecologically valid military speed and load combinations. Thirty-nine male serving infantry soldiers completed thirteen 20-minute bouts of overground load carriage comprising 2 speeds (2.5 and 4.8 km·h21) and 6 carried equipment load combinations (25, 30, 40, 50, 60, and 70 kg), with 22 also completing a bout at 5.5 km·h21 carrying 40 kg. For each speed-load combination, the metabolic cost was measured using the Douglas bag technique and compared with the metabolic cost predicted from 5 equations; Givoni and Goldman, 1971 (GG), Pandolf et al. 1997 (PAN), Santee et al. 2001 (SAN), American College of Sports Medicine 2013 (ACSM), and the Minimum-Mechanics Model (MMM) by Ludlow and Weyand, 2017. Comparisons between measured and predicted metabolic cost were made using repeated-measures analysis of variance and limits of agreement. All predictive equations, except for PAN, underpredicted the metabolic cost for all speed-load combinations (p , 0.001). The PAN equation accurately predicted metabolic cost for 40 and 50 kg at 4.8 km·h21 (p.0.05), underpredicted metabolic cost for all 2.5 km·h21 speed-load combinations as well as 25 and 30 kg at 4.8 km·h21, and overpredicted metabolic cost for 60 and 70 kg at 4.8 km·h21 (p ,0.001). Most equations (GG, SAN, ACSM, and MMM) underpredicted metabolic cost while one (PAN) accurately predicted at moderate loads and speeds, but overpredicted or underpredicted at other speed-load combinations. Our findings indicate that caution should be applied when

using these predictive equations to model military load carriage tasks.

Item Type: | Articles |
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Subjects: | Q Science > QP Physiology U Military Science > U Military Science (General) |

Divisions: | Academic Areas > Institute of Sport > Area > Exercise Physiology |

Depositing User: | Stephen Myers |

Date Deposited: | 18 May 2020 10:34 |

Last Modified: | 08 May 2021 00:10 |

URI: | https://eprints.chi.ac.uk/id/eprint/5152 |