# Real-Time Postural Feedback to Optimize Ergonomics and Musculoskeletal Health in Ophthalmology Residents: A Canadian Pilot Quality Improvement Study

## TL;DR

A wearable posture trainer improved short-term posture and reduced musculoskeletal pain in ophthalmology residents, but long-term effects were less consistent.

## Contribution

This is the first pilot study to evaluate a wearable posture trainer's impact on ergonomics and musculoskeletal health in ophthalmology residents.

## Key findings

- Residents improved upright posture time from 68.9% to 78.5% with real-time feedback.
- MSK pain scores decreased to their lowest at long-term follow-up, averaging 3.5.
- Long-term posture retention declined to 52.4% without continued feedback.

## Abstract

Background

Musculoskeletal (MSK) pain is a common occupational concern in ophthalmology, often associated with the sustained and ergonomically demanding positions required during clinical and surgical activities. Tasks such as slit-lamp examinations, indirect ophthalmoscopy, and microscope-assisted procedures may contribute to postural strain. Despite this, ergonomics remains an underemphasized component of resident education, even though physical strain during training can influence long-term clinical performance and physician well-being. This pilot study investigates whether the UPRIGHT GO 2, a wearable posture trainer, can improve posture and reduce MSK pain in ophthalmology residents.

Methodology

This prospective, interventional, proof-of-concept case series recruited five postgraduate year (PGY) 2 to 5 ophthalmology residents at McMaster University. Each participant wore the UPRIGHT GO 2 device over the following four distinct two-week phases: baseline, training, short-term testing, and long-term testing. During the baseline phase, the vibration mode was turned off to establish baseline posture data. In the training phase, the vibration mode was activated with a 30-second delay to provide real-time posture feedback. The short-term testing phase was conducted with the vibration turned off to assess short-term retention effects. The long-term testing phase, also with vibration off, was performed six weeks after short-term testing to evaluate long-term effects. All participants attended a brief standardized educational session before device use, which reviewed ergonomic principles relevant to ophthalmology, including optimal posture during slit-lamp examinations, indirect ophthalmoscopy, and microscope-guided procedures. The primary outcome was the percent time spent in an upright posture. The secondary outcome was MSK pain, assessed using a modified Nordic musculoskeletal and numerical pain rating scale.

Results

All participants (N = 5, 100%) completed the baseline and training phases, with two residents (n = 2, 40%) completing the full study through long-term testing. The mean proportion of time spent in an upright posture increased from 68.9% at baseline to 78.5% during the training phase, coinciding with the activation of vibration-based feedback. This improvement declined to 66.8% during short-term testing and further to 52.4% at long-term follow-up (n = 2, 40%), suggesting a potential attenuation of effect in the absence of continued reinforcement. MSK pain scores followed a similar pattern: mean scores increased slightly from 6.6 to 7.4 post-baseline, then declined post-training (6.4), post-short-term testing (6.5), and reached their lowest average at long-term follow-up (3.5, n = 2, 40%). All participants demonstrated either stable or improved pain scores, with two residents exhibiting concordant improvements in both posture and pain. These findings suggest that wearable feedback devices may enhance ergonomics and mitigate MSK symptoms among ophthalmology residents when incorporated into clinical training environments.

Conclusions

The UPRIGHT GO 2, combined with an educational intervention, may provide short-term ergonomic benefit for posture and MSK pain in ophthalmology residents. However, long-term posture retention varied. Limitations include the small sample size and device data fidelity. Larger studies are needed to validate these findings and guide ergonomic strategies in medical training.