Three-dimensional kinetic function of the lumbo-pelvic-hip complex during block start

Area of Science:

• Biomechanics
• Sports Science
• Athletic Performance

Background:

• Previous research on track and field block starts primarily focused on lower-limb sagittal kinetics.
• The role of lumbopelvic muscles in generating mechanical energy during block starts remained underexplored.

Purpose of the Study:

• To investigate the three-dimensional lumbo-pelvic-hip kinetics during the block start.
• To determine the contribution of these muscle groups to mechanical energy generation.

Main Methods:

• Utilized 3D motion capture and force platform data from 12 male sprinters during 10m maximal sprints.
• Calculated three-dimensional lumbo-pelvic-hip kinetics.

Main Results:

• Peak lumbosacral extension torque was significantly higher than other lower-limb and lumbosacral torques.
• Lumbosacral extensors generated significant mechanical energy during the double-stance phase.
• Lumbosacral lateral flexors and hip abductors contributed substantial mechanical work during the single-stance phase.

Conclusions:

• Lumbopelvic muscles play a vital role in energy generation during block starts.
• Strengthening lumbopelvic extensors, lateral flexors, and hip abductors may enhance block start performance.
• Further research is needed to validate training strategies targeting these muscle groups.