Patterns of Sitting, Standing, and Stepping After Lower Limb Amputation

Area of Science:

• Biomechanics and Rehabilitation Science
• Amputee Mobility and Physical Activity Analysis

Background:

• Understanding daily movement patterns is crucial for individuals with lower limb amputation (LLA).
• Sedentary behavior and physical inactivity are significant concerns impacting health outcomes in the LLA population.

Purpose of the Study:

• To characterize sitting, standing, and stepping behaviors in individuals with LLA.
• To compare these movement patterns between individuals with dysvascular LLA and traumatic LLA.

Main Methods:

• Accelerometry was used to measure daily sitting, standing, and stepping times in participants with LLA.
• Data were analyzed as percentages of waking time and categorized into specific bout durations for each activity.

Main Results:

• Participants spent the majority of their day sitting (median 77%), with significant portions in prolonged bouts (>90 minutes).
• Most standing and stepping occurred in short bouts (<1 minute), indicating fragmented physical activity.
• Individuals with dysvascular LLA spent more time sitting and less time standing compared to those with traumatic LLA.

Conclusions:

• People with LLA demonstrate high levels of sedentary behavior and accumulate physical activity in very short durations.
• These patterns may elevate mortality risk, highlighting the need for interventions to reduce sedentary time and increase sustained physical activity.