Objective functional assessment in orthopedics: The emerging role of wearable technologies

Functional outcome assessment in orthopedic surgery has long relied on patient-reported measures and intermittent clinical evaluations. While these tools provide valuable insight, they are often limited by subjectivity and may not accurately reflect real-world functional performance. Wearable technologies (“wearables”) have emerged as a promising means to capture objective, continuous, and ecologically valid data on mobility, activity levels, and joint mechanics. These devices, which range from consumer-grade fitness trackers to specialized medical-grade sensors, can enable detailed monitoring of recovery across various orthopedic contexts, including joint arthroplasty, fracture care, spine surgery, and sports injuries. By quantifying parameters such as gait patterns, step count, range of motion, and activity intensity, wearables offer a more nuanced understanding of functional recovery over time. Early evidence supports their ability to complement traditional assessments and enhance postoperative monitoring. However, challenges remain, including variability in device accuracy, patient adherence, data interpretation, and integration into clinical practice. As these technologies continue to evolve, they hold significant potential to personalize rehabilitation, support remote care models, and improve outcome measurement in orthopedic surgery. Ongoing research and standardization efforts will be critical to unlocking their full clinical utility.