OBJECTIVES: The purpose of this study was to examine metabolic effects of soldier performance on a simulated road march, comparing two functionally equivalent military ensembles (FEMEs) with changing gradation of marching, and to create prediction equations addressing workload with different loads and treadmill grades. METHODS: Fourteen male military subjects were tested while wearing two different FEMEs on a graded (0%, 5%, or 10%), 3.5 miles/h, road march for 30 minutes. Data collected included oxygen uptake (VO2), carbon dioxide output, ventilation, respiratory exchange ratio, and heart rate (HR). RESULTS: No significant differences were found between the two FEMEs in each graded condition. Combining ensemble data, significant differences occurred in all conditions, comparing all grades. A 10% graded road march (3.5 miles/h, approximately 27-kg load) represented 61% to 90% of maximal values. For treadmill grades of <10%, VO2 and HR were modeled as follows (adjusted R2 = 0.89 [VO2] and 0.82 [HR]): VO2 (mL/kg per minute) = 10 + [2 - grade (%)] + [0.2 - load (% of body mass)]; HR (beats per minute) = 90 + [6 . grade (%)] + [0.7 - load (% of body mass)]. CONCLUSIONS: Three factors, namely, elevation grade, equipment weight (load), and overall subject physical abilities, were significant for overall metabolic demand during a simulated graded road march and might affect field performance.
OBJECTIVES: The purpose of this study was to examine metabolic effects of soldier performance on a simulated road march, comparing two functionally equivalent military ensembles (FEMEs) with changing gradation of marching, and to create prediction equations addressing workload with different loads and treadmill grades. METHODS: Fourteen male military subjects were tested while wearing two different FEMEs on a graded (0%, 5%, or 10%), 3.5 miles/h, road march for 30 minutes. Data collected included oxygen uptake (VO2), carbon dioxide output, ventilation, respiratory exchange ratio, and heart rate (HR). RESULTS: No significant differences were found between the two FEMEs in each graded condition. Combining ensemble data, significant differences occurred in all conditions, comparing all grades. A 10% graded road march (3.5 miles/h, approximately 27-kg load) represented 61% to 90% of maximal values. For treadmill grades of <10%, VO2 and HR were modeled as follows (adjusted R2 = 0.89 [VO2] and 0.82 [HR]): VO2 (mL/kg per minute) = 10 + [2 - grade (%)] + [0.2 - load (% of body mass)]; HR (beats per minute) = 90 + [6 . grade (%)] + [0.7 - load (% of body mass)]. CONCLUSIONS: Three factors, namely, elevation grade, equipment weight (load), and overall subject physical abilities, were significant for overall metabolic demand during a simulated graded road march and might affect field performance.
Authors: Drew E Gonzalez; Matthew J McAllister; Hunter S Waldman; Arny A Ferrando; Jill Joyce; Nicholas D Barringer; J Jay Dawes; Adam J Kieffer; Travis Harvey; Chad M Kerksick; Jeffrey R Stout; Tim N Ziegenfuss; Annette Zapp; Jamie L Tartar; Jeffery L Heileson; Trisha A VanDusseldorp; Douglas S Kalman; Bill I Campbell; Jose Antonio; Richard B Kreider Journal: J Int Soc Sports Nutr Date: 2022-06-23 Impact factor: 4.948
Authors: Rachel V Vitali; Stephen M Cain; Lauro V Ojeda; Michael V Potter; Antonia M Zaferiou; Steven P Davidson; Megan E Coyne; Clifford L Hancock; Alyssa Mendoza; Leia A Stirling; Noel C Perkins Journal: PLoS One Date: 2019-03-21 Impact factor: 3.240
Authors: Robin Orr; Rodney Pope; Thiago Jambo Alves Lopes; Dieter Leyk; Sam Blacker; Beatriz Sanz Bustillo-Aguirre; Joseph J Knapik Journal: Int J Environ Res Public Health Date: 2021-04-11 Impact factor: 3.390