Sustained operations in confined-space military vehicles

Area of Science:

• Military science
• Human factors engineering
• Occupational health

Background:

• Extended sitting postures and confined workspaces are common in military operations.
• Understanding the impact on soldier fitness and performance is crucial for mission success.
• Previous research has not fully elucidated these effects in realistic military vehicle environments.

Purpose of the Study:

• To investigate the effects of prolonged sitting and workstation characteristics on soldier fitness and performance.
• To evaluate the efficacy of active breaks in mitigating performance decrements.
• To assess the influence of confinement levels on physical fitness.

Main Methods:

• Conducted 2 baseline studies and 1 experiment in a confined-space military vehicle.
• Measured changes in physical fitness, observation performance, and technical performance over time.
• Incorporated active breaks (sitting to standing/walking) as an intervention.

Main Results:

• Physical fitness decreased by over 10% per hour of sitting.
• Observation performance declined by 30% per hour.
• Technical performance showed a minimal decrease (<5% per hour).
• Active breaks significantly reduced the decline in physical fitness, nearing zero.
• The degree of confinement impacted physical fitness levels.

Conclusions:

• Prolonged sitting in confined military vehicles negatively affects soldier fitness and performance.
• Active breaks are a viable strategy to counteract these detrimental effects.
• Vehicle design and operational protocols should consider confinement and incorporate regular breaks to maintain soldier effectiveness.