Study finds humanoid robots pose unforeseen ergonomic risks to human coworkers

As humanoid robots enter industrial environments for close physical interaction with human workers, a critical safety question arises: are their bodies designed to avoid ergonomic strain? A new study by researcher He Wen, accepted and presented at the IISE Annual Conference & Expo 2026, systematically examines this issue from an anthropometric perspective. Using ISO 7250—the international standard for human body measurements—as a reference, Wen benchmarked six contemporary humanoid robots based on externally observable geometry. The study evaluated landmark identifiability, measurement feasibility, and cross-platform patterns of anthropometric deviation. Results show that while some joint-level dimensions remain measurable, several ISO-defined landmarks tied to biological anatomy (e.g., specific bony prominences) are consistently inapplicable to humanoid robots.

More importantly, the paper identifies four recurring patterns of anthropometric deviation across all robot platforms: additive (extra or duplicated features), subtractive (missing features), exaggerative (overly large or small proportions), and speculative (features with no human equivalent). These patterns indicate that ergonomic risk does not stem from scale mismatch alone, but from how robot bodies diverge from fundamental human shape and articulation assumptions. The study concludes that ISO 7250 remains a useful framework but its direct transfer to humanoids is limited. Wen advocates for new, anthropometry-aware evaluation approaches to prevent strain and injury in human-robot collaboration scenarios—a critical need as humanoids become common in factories and warehouses.