Maximal Walking Distance in Persons with a Lower Limb Amputation.

Area of Science:

• Biomechanics and Rehabilitation Engineering
• Clinical Outcomes Assessment
• Amputee Mobility Research

Background:

• Self-reported mobility, such as the SIGAM mobility grade, is commonly used to assess walking distance in lower limb amputees but tends to overestimate physical activity.
• Objective quantification of daily walking activity is crucial for accurate functional outcome assessment in this population.

Discussion:

• Accelerometer data revealed significantly fewer maximal consecutive steps and walking bouts in lower limb amputees compared to age-matched controls.
• A notable discrepancy exists between self-reported SIGAM mobility grades and objectively measured walking capacity in a substantial portion of amputee participants.
• The study highlights that the SIGAM mobility grade may not accurately reflect the real-world mobility limitations experienced by individuals with lower limb amputations.

Key Insights:

• Maximal consecutive steps and walking bouts were significantly reduced in lower limb amputees (p < 0.001).
• Only 20% of amputees achieved walking distances comparable to controls.
• SIGAM mobility grade showed only a moderate correlation with maximal covered distance, with discrepancies in 30% of cases.

Outlook:

• Objective assessment of maximal consecutive steps and covered distance using wearable sensors is recommended for clinical evaluation.
• Future research should focus on refining objective mobility assessment tools for amputee rehabilitation.
• Integrating objective data can lead to more personalized and effective treatment strategies for lower limb amputees.