Correlation between hip function and knee kinematics evaluated by three-dimensional motion analysis during lateral...

Area of Science:

• Biomechanics
• Sports Medicine
• Orthopedics

Background:

• Side hopping is a common athletic movement.
• Knee and hip interactions during side hopping are not well understood.
• Biomechanical analysis can reveal injury risks.

Purpose of the Study:

• To investigate knee biomechanics during side hopping.
• To analyze the relationship between knee motion and hip function.
• To identify factors influencing side hop performance and injury potential.

Main Methods:

• Utilized a 3D motion analysis system for knee kinematics and kinetics.
• Assessed hip range of motion and muscle strength in college rugby players.
• Correlated knee movement parameters with clinical hip measurements.

Main Results:

• During lateral touchdown, the knee exhibited abduction and external rotation with increasing abduction moments.
• Hip internal rotation range of motion showed significant correlation with knee external rotation angle and moments.
• Limited hip internal rotation was associated with altered knee alignment during landing.

Conclusions:

• Hip internal rotation range of motion is a critical factor in side hopping biomechanics.
• Clinical assessment of hip function, particularly internal rotation, is important for interpreting side hop test results.
• Improving hip mobility may mitigate adverse knee loading during side hopping.