Correlations between muscle-tendon parameters and acceleration ability in 20 m sprints

Area of Science:

• Biomechanics
• Sports Science
• Human Movement

Background:

• Sprint running performance is influenced by complex interactions between muscle and tendon properties.
• Understanding these relationships is crucial for optimizing training and performance in sprinters.
• The acceleration phase is critical for overall sprint success.

Purpose of the Study:

• To investigate the correlations between specific muscle-tendon parameters and key performance variables during the acceleration phase of sprint running.
• To determine whether peak or average values of velocity, force, and power are more strongly related to muscle-tendon morphology.
• To provide insights into the biomechanical factors influencing sprint performance.

Main Methods:

• Eighteen male sprinters participated, with their 100m personal bests recorded.
• Horizontal velocity was measured using radar, and force and power were calculated.
• Muscle thickness, fascicle length, pennation angle, and Achilles tendon properties were assessed via ultrasonography.

Main Results:

• Muscle-tendon parameters demonstrated stronger correlations with peak force, peak power, and peak speed compared to average velocity over 20 meters.
• Specific correlations ranged from R=0.53 to 0.92 for peak values, while average velocity correlations were lower (R=0.41-0.61).
• Peak power occurred approximately 1 second into the sprint.

Conclusions:

• Muscle-tendon characteristics are significantly related to sprint performance, particularly when examining peak force and power outputs.
• Assessing peak power provides a more accurate reflection of muscle-tendon parameter influence than average velocity measures.
• These findings can inform targeted training strategies to enhance sprint acceleration by focusing on muscle-tendon optimization.