Are the new starting block facilities beneficial for backstroke start performance?

Area of Science:

• Sports Science
• Biomechanics
• Swimming Performance

Background:

• Optimizing the backstroke start is crucial for competitive swimming.
• Understanding the biomechanical effects of starting equipment and techniques is essential for performance enhancement.

Purpose of the Study:

• To analyze the impact of handgrip positioning (horizontal vs. vertical) and wedge use on backstroke start performance and technique.
• To identify optimal configurations for maximizing kinematic parameters during the start phase.

Main Methods:

• Ten swimmers performed eight 15m backstroke starts under randomized conditions (horizontal/vertical handgrips, with/without wedge).
• Kinematic data were captured using surface and underwater cameras.
• Statistical analysis employed standardized mean difference (SMD) with 95% confidence intervals (CI).

Main Results:

• Vertical handgrip with a wedge enhanced take-off angle and center of mass (CM) vertical velocity.
• Horizontal handgrip with a wedge increased knee angular velocity.
• Handgrip positioning alone did not significantly alter kinematics without the wedge.

Conclusions:

• Vertical handgrip combined with a wedge offers significant biomechanical advantages for backstroke starts.
• Swimmers should leverage the benefits of vertical handgrips and wedges, maintaining technique through the entry and underwater phases.
• Further research could explore other starting aids and their interaction with handgrip variations.