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Effects of backpack load on balance and decisional processes
Bryson May1, Phillip D Tomporowski, Michael Ferrara
1Department of Kinesiology, University of Georgia, 115 Ramsey, Athens, GA 30602, USA.
Military Medicine
|January 9, 2010
Summary
Carrying a 30% body weight backpack significantly impairs balance and cognitive function, especially during complex decision-making tasks. These effects persist over 22 minutes, impacting situational awareness.
Area of Science:
- Biomechanics
- Cognitive Neuroscience
- Human Factors Engineering
Background:
- Backpack carriage is common in military and civilian populations.
- Understanding its impact on balance and cognitive function is crucial for safety and performance.
Purpose of the Study:
- To investigate the effects of a 30% body weight backpack load on young adults' balance and rapid decision-making.
- To assess cognitive load and executive function during dual-task scenarios.
Main Methods:
- Dual-task methodology involving perturbed balance and auditory choice-reaction tasks.
- Participants (N=20) underwent testing with and without a 30% body weight ALICE backpack.
- Balance and cognitive performance were measured during 18, 60-second trials with varied sensory conditions.
Main Results:
- Backpack carriage significantly disrupted balance control.
- Cognitive processes, particularly executive function, were degraded by the load.
- Effects were consistent over 22 minutes of testing and more pronounced during higher-level cognitive tasks.
Conclusions:
- A 30% body weight backpack load negatively impacts both physical balance and cognitive situational awareness.
- These findings are relevant for military personnel (ROTC cadets) and individuals carrying heavy loads.
- Implications for training and equipment design to mitigate performance decrements.
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