How Exoskeletons are Transforming Workplace Ergonomics: A Look at Muscle Activation and Fatigue Reduction

Workplace ergonomics has long been a focus in industries that require repetitive, physically demanding tasks. In the automotive sector, where overhead work is common, workers experience significant muscle fatigue and an increased risk of musculoskeletal disorders (MSDs). To address these issues, companies are exploring the potential benefits of exoskeletons—wearable devices designed to support and redistribute muscular effort. Our colleague Giovanni Nolli recently had the chance to investigate the benefits of exoskeletons on overhead work and lifting actions using Ultium EMG.

APDF Analysis with Noraxon Ultium EMG

This study, conducted with the Noraxon Ultium EMG system, focused on anterior deltoid activation during lifting tasks with and without the Levitate exoskeleton. The Amplitude Probability Distribution Function (APDF) curves revealed a striking difference in muscle engagement:

• With the exoskeleton, 60% of the time was spent at resting muscle tone, reducing sustained muscle activation.
• Without the exoskeleton, this figure dropped to less than 30%, indicating greater continuous muscle effort.
• This pattern persisted throughout the task, reflecting a more economical muscle activation profile with the exoskeleton.

Implications for Workplace Ergonomics

The results highlight the potential of exoskeletons to reduce muscle fatigue and improve efficiency in repetitive, strenuous tasks. By redistributing load and reducing peak muscle activation, exoskeletons can help workers perform demanding tasks with less strain, potentially lowering the risk of MSDs over time.

Final Thoughts

The integration of wearable assistive technologies like the Levitate exoskeleton marks a significant step forward in workplace ergonomics. As more industries adopt these tools, further research will be essential to optimize their design and implementation. For now, the data suggests that exoskeletons provide a promising solution for reducing muscle fatigue and improving work efficiency in labor-intensive environments.

Would you implement exoskeletons in your workplace? Let us know your thoughts!