Arm-leg coordination in flat breaststroke: a comparative study between elite and non-elite swimmers

Area of Science:

• Sports Science
• Biomechanics
• Swimming Performance Analysis

Background:

• Understanding arm-leg coordination is crucial for optimizing swimming technique.
• Flat breaststroke involves complex inter-limb timing for efficient propulsion.
• Competitive swimming performance is influenced by stroke mechanics and timing.

Purpose of the Study:

• To compare arm-leg coordination in flat breaststroke between elite and non-elite male and female swimmers.
• To identify temporal differences in arm and leg actions across various race paces.
• To investigate the relationship between coordination timing and swimming performance levels.

Main Methods:

• Utilized a velocity-video system to analyze hip acceleration and deceleration phases.
• Identified four temporal gaps representing arm-leg action timing.
• Measured stroke cycle parameters including glide phase duration and stroke length at different race paces (50m, 100m, 200m).

Main Results:

• Elite swimmers exhibited significantly shorter glide phases (11.89-18.80%) compared to non-elite swimmers (19.60-31.04%).
• Elite swimmers demonstrated longer stroke lengths (2.03-2.05m) versus non-elite swimmers (1.73-1.82m).
• Elite swimmers showed greater continuity in arm and leg actions, indicating superior inter-limb timing.

Conclusions:

• Elite breaststroke swimmers optimize propulsion by minimizing the glide phase.
• Superior arm-leg coordination and timing are characteristic of elite breaststroke performance.
• Reducing glide duration and enhancing inter-limb timing are key strategies for improving breaststroke propulsion.