Weight-Induced Consumed Endurance (WICE): A Model to Quantify Shoulder Fatigue with Weighted Objects
summary
Presents WICE, a quantitative shoulder-fatigue model that adds a weight term and per-person arm mass to refine shoulder-torque and center-of-mass estimates, and frames outputs probabilistically with a Bayesian framework. Validated with a posture-hold study (arms at 90°, sandbags 0–2 kg) against measured endurance time and Borg CR10 ratings, WICE strongly correlates with ground truth and captures the endurance drop as weight increases, showing ~5% performance loss for common controllers and larger losses for heavy haptics.
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