Neuromuscular and cardiovascular responses of Royal Marine recruits to load carriage in the field

Applied Ergonomics
Joanne L FallowfieldJoseph Layden

Abstract

Cardiovascular and neuromuscular responses of 12 male Royal Marine recruits (age 22 ± 3 years, body mass 80.7 ± 6.8 kg, VO(2)max 52.3 ± 2.7 ml kg(-1) min(-1)) were measured during 19.3 km of load carriage walking at 4.2 km h(-1) and carrying 31.0 kg. Heart rate during load carriage was 145 ± 10 beats·min(-1) (64 ± 5 %HRR) and showed a negative relationship with body mass (r = -0.72, P = 0.009) but no relationship with VO(2)max (ml kg(-1) min(-1); r = -0.40, P = 0.198). Load carriage caused a decrease in vertical jump height (8 ± 9%) and power (5 ± 5%) (P < 0.001). Change in vertical jump power showed a positive relationship with body mass (r(2) = 0.40, P = 0.029) but no relationship to VO(2)max (ml kg(-1) min(-1); r(2) = 0.13, P = 0.257). In conclusion, load carriage caused a reduction in vertical jump performance (i.e. decreased neuromuscular function). Lighter individuals were disadvantaged when carrying absolute loads, as they experienced higher cardiovascular strain and greater decreases in neuromuscular function.

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Citations

Aug 26, 2014·Applied Ergonomics·Kari L LoverroJeffrey M Schiffman
Feb 26, 2016·International Journal of Environmental Research and Public Health·Robin OrrMichael Stierli
Jun 10, 2016·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Nigel A S TaylorStewart R Petersen
Jun 10, 2016·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Stephen S CheungJuha Oksa
Jan 14, 2017·Journal of Applied Biomechanics·Daniel E LidstoneJeffrey M McBride
Feb 12, 2014·Journal of Strength and Conditioning Research·Rachel E WalkerSheri R Colberg
Sep 8, 2017·Extreme Physiology & Medicine·John W CastellaniStefan M Pasiakos
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May 1, 2021·International Journal of Environmental Research and Public Health·Robin OrrJoseph J Knapik
May 20, 2021·European Journal of Sport Science·Jani P VaaraBrad C Nindl
Jul 15, 2021·European Journal of Sport Science·Eva Orantes-GonzalezManuel Escabias
Aug 28, 2021·International Journal of Environmental Research and Public Health·Denisse BustosJoão Santos Baptista

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