Kinematic and kinetic analysis during forward and backward walking

Area of Science:

• Biomechanics
• Kinesiology
• Exercise Physiology

Background:

• Backward walking (BW) is an emerging exercise with limited comparative motion analysis data.
• Understanding the kinetic mechanisms of BW is crucial for its application and safety.

Purpose of the Study:

• To analyze the biomechanics of backward walking (BW) compared to forward walking (FW).
• To identify the joint-specific mechanisms, moments, and powers involved in BW using kinetic analysis.

Main Methods:

• Utilized a 3D motion capture system and force plates for kinetic and kinematic data acquisition.
• Compared forward walking (FW) and backward walking (BW) trials in participants.
• Analyzed joint movements, moments, and powers, including time-reversed BW data, using paired t-tests.

Main Results:

• Significant differences in stride characteristics and joint power generation were observed between BW and FW.
• The ankle joint was identified as the primary joint for propulsion and shock absorption during BW.
• Knee and hip joints demonstrated simpler moment patterns in time-reversed BW and did not generate propulsion power.

Conclusions:

• Backward walking exhibits distinct joint power dynamics compared to forward walking.
• The ankle joint plays a critical role in backward walking propulsion and shock absorption.
• Further research into BW biomechanics can inform exercise prescription and injury prevention.