A Kinematics Comparison of Different Swimming Relay Start Techniques

Area of Science:

• Sports Science
• Biomechanics
• Swimming Performance

Background:

• Relay swimming starts are crucial for race outcomes.
• Optimal start technique remains unclear for competitive advantage.
• The Omega OSB11 starting block is a new piece of equipment.

Purpose of the Study:

• To compare kinematic characteristics of different swimming relay start techniques.
• To evaluate the impact of no-step (parallel/separated feet) and one-step starts.
• To analyze performance using the Omega OSB11 starting block.

Main Methods:

• Kinematic analysis of 11 international youth swimmers.
• Filming of three start techniques: no-step parallel, no-step separated, and one-step starts.
• Calculation of center of mass kinematics using 2D-DLT algorithms.

Main Results:

• Significant differences observed in spatiotemporal parameters of block, aerial, and underwater phases between techniques.
• No statistical differences found in 5m, 10m, or 15m start times or horizontal take-off velocity.
• A trend indicated the one-step start may be superior to non-step techniques.

Conclusions:

• Relay start technique differences may depend more on angular kinematics (body posture) during block, flight, and underwater phases.
• Linear center of mass kinematics did not show significant performance differences between tested relay start techniques.
• Further research into angular kinematics could optimize relay start strategies.