Changes in joint kinetics during learning the longswing on high bar.

Area of Science:

• Sports Biomechanics
• Motor Learning
• Gymnastics Performance

Background:

• Biomechanics is crucial for understanding technique changes and performance improvements in skill acquisition.
• The longswing on the high bar is a complex gymnastic skill requiring specific joint kinetic adaptations during learning.

Purpose of the Study:

• To investigate the joint kinetic characteristics associated with technique development during the learning of the longswing on the high bar.
• To identify key biomechanical constraints limiting performance in novice high bar gymnasts.

Main Methods:

• Twelve novice male participants performed longswing attempts over 8 weekly sessions.
• Kinematic data were collected and analyzed using inverse dynamics to quantify joint moments and power at the hips and shoulders.
• Biomechanical constraints were identified based on changes in joint kinetics throughout the learning process.

Main Results:

• Key performance constraints included the ability to generate sufficient shoulder power and overcome passive kinetics during the downswing.
• Novices demonstrated limitations in hip and shoulder joint kinetics that were not adequately described by traditional functional phases.
• The identified kinetic constraints differentially challenge learners, suggesting a need for individualized interventions.

Conclusions:

• Joint kinetic characteristics are critical for understanding technique changes and performance improvements in the longswing.
• Individualized learning interventions targeting specific kinetic constraints, such as shoulder power generation and passive downswing overcoming, are recommended.
• Functional phases may help identify novices struggling with passive kinetic constraints, guiding targeted feedback and training.