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Sit-to-stand movement analysis in obese subjects
M Galli1, M Crivellini, F Sibella
1Department of Bioengineering, Polytechnic of Milan, Italy. galli@biomed.polimi.it
Summary
Obese individuals alter sit-to-stand strategies, initially limiting trunk flexion for spinal protection. Fatigue prompts increased forward bending to reduce knee joint load during this daily activity.
Area of Science:
- Biomechanics
- Kinesiology
- Obesity Research
Background:
- The sit-to-stand (STS) movement is a fundamental daily activity.
- Obesity significantly impacts biomechanical strategies and joint loading during functional tasks.
- Understanding movement adaptations in obese individuals is crucial for targeted interventions.
Purpose of the Study:
- To investigate the distinct sit-to-stand (STS) movement strategies employed by obese individuals.
- To evaluate the joint load conditions (hip, knee, ankle) during STS in obese subjects.
- To compare movement patterns between obese individuals and healthy controls.
Main Methods:
- A cross-sectional, controlled study design.
- Quantitative three-dimensional analysis of the sit-to-stand (STS) movement using an optoelectronic system.
- Analysis of angle parameters during 10 STS trials per subject for both obese individuals and healthy controls.
Main Results:
- Controls exhibited a consistent forward trunk bending strategy during STS.
- Obese subjects initially limited trunk flexion to protect the vertebral column.
- With increased fatigue, obese subjects increased forward bending to reduce knee joint torque, prioritizing task completion over spinal protection.
Conclusions:
- Obese individuals modify their STS strategy, particularly under fatigue.
- These movement adaptations aim to alleviate joint stress and muscle fatigue.
- Findings can inform the design of future rehabilitation programs for obese populations.