A Preliminary Investigation of the Effect of Protective Clothing Weight, Bulk and Stiffness on Combat Mobility Course Performance

Soldier loads continue to rise in response to new technological capabilities and emerging threats. However, literature addressing the extent to which load mass properties affects operational task performance and mission outcome is sparse. The objective of this preliminary study was to quantify the effect of PPE mass properties (weight, bulk and stiffness) on combat mobility, as measured using the standardized Load Effects Assessment Program (LEAP) course. Twenty-four soldiers completed the LEAP course in three clothing and individual equipment (CIE) configurations (UE: unencumbered; FFO: full fighting order (FFO) without body armour; and FFO+: FFO with body armour). Significant differences between clothing conditions were revealed for LEAP performance metrics (overall course time). Regression analysis revealed significant relationships between overall mobility performance and condition mass properties of weight, bulk, and stiffness. Outcomes will influence the design of future CIE and future research in this area.

[1]  Richard Ricciardi,et al.  Metabolic demands of body armor on physical performance in simulated conditions. , 2008, Military medicine.

[2]  Charles E. Dean.  The Modern Warrior's Combat Load - Dismounted Operations in Afghanistan: 356 , 2008 .

[3]  Leif Hasselquist,et al.  The effects of movement and physical exertion on soldier vigilance. , 2007, Aviation, space, and environmental medicine.

[4]  Brian Corner,et al.  Understanding the Physiological, Biomechanical, and Performance Effects of Body Armor Use , 2008 .

[5]  Brian Corner,et al.  AN INVESTIGATION OF THREE EXTREMITY ARMOR SYSTEMS: DETERMINATION OF PHYSIOLOGICAL, BIOMECHANICAL, AND PHYSICAL PERFORMANCE EFFECTS AND QUANTIFICATION OF BODY AREA COVERAGE , 2012 .

[6]  Brad Aisbett,et al.  The effect of body armor on performance, thermal stress, and exertion: a critical review. , 2011, Military medicine.

[7]  Bradley C Nindl,et al.  Reliability assessment of two militarily relevant occupational physical performance tests. , 2003, Canadian journal of applied physiology = Revue canadienne de physiologie appliquee.

[8]  Stacie I. Ringleb,et al.  Physical Performance Decrements in Military Personnel Wearing Personal Protective Equipment (PPE) , 2009 .

[9]  Ilse Jonkers,et al.  Evaluation of the effect of backpack load and position during standing and walking using biomechanical, physiological and subjective measures , 2007, Ergonomics.

[10]  S. Birrell,et al.  The effect of military load carriage on ground reaction forces. , 2007, Gait & posture.

[11]  Vicki S Conn,et al.  Lightening the Load , 2013, Western journal of nursing research.

[12]  N Gledhill,et al.  A study to validate the modified Canadian Aerobic Fitness Test. , 1995, Canadian journal of applied physiology = Revue canadienne de physiologie appliquee.

[13]  Daniela Heinrich.  Marine Corps Load Effects Assessment Program (MC-LEAP) - a standardized test methodology for dismounted soldier systems applicable for Norway? , 2016 .

[14]  T. Crowder,et al.  Effects of heavy load carriage during constant-speed, simulated, road marching. , 2007, Military medicine.

[15]  Peter N. Frykman,et al.  A Comparison of Two Commercial Off the Shelf Backpacks to the Modular Lightweight Load Carrying Equipment (MOLLE) in Biomechanics, Metabolic Cost and Performance , 2003 .

[16]  J. Knapik,et al.  Soldier load carriage: historical, physiological, biomechanical, and medical aspects. , 2004, Military medicine.

[17]  R. L. Attwells,et al.  Influence of carrying heavy loads on soldiers' posture, movements and gait , 2006, Ergonomics.