Differences in lower limb muscle activation patterns during Sit to Stand Task for different heel heights.

Area of Science:

• Biomechanics
• Human Movement Science
• Kinesiology

Background:

• Footwear, particularly high heels, significantly influences biomechanical forces and muscle activity in the lower limbs.
• Understanding these effects is crucial for preventing musculoskeletal injuries and optimizing movement efficiency.

Purpose of the Study:

• To investigate the impact of varying heel heights on lower limb muscle activation patterns during the Sit to Stand (STS) task.
• To analyze how different heel heights affect muscle utilization and postural control in females.

Main Methods:

• Surface electromyography (sEMG) was used to record muscle activity in ten female participants.
• Participants performed the STS task while wearing shoes with four different heel heights (4cm to 10cm).
• Signal processing techniques were applied to analyze sEMG data and muscle utilization percentages.

Main Results:

• Muscle activation in the lower limbs significantly increased with higher heel heights during the STS task.
• Elevated heel heights led to altered muscle utilization patterns, indicating compensatory strategies for postural balance.
• A potential for muscle imbalance was identified with increased muscle activity at higher heel elevations.

Conclusions:

• Wearing higher heels during the Sit to Stand task alters lower limb muscle activation patterns in females.
• The findings suggest that increased muscle activity and compensatory mechanisms may contribute to muscle imbalance and potential injury risk with prolonged high heel use.