A simple method for measuring power, force, velocity properties, and mechanical effectiveness in sprint running

Area of Science:

• Biomechanics
• Sports Science
• Human Movement Analysis

Background:

• Accurate assessment of sprint running mechanics is crucial for performance optimization.
• Traditional laboratory methods using force plates are accurate but lack field applicability.
• A simple, field-deployable method is needed to evaluate sprint performance parameters.

Purpose of the Study:

• To validate a novel, simple field method for assessing force- and power-velocity relationships in sprint running.
• To determine the mechanical effectiveness of force application during sprint acceleration.
• To evaluate the reliability and concurrent validity of the proposed field method.

Main Methods:

• An inverse dynamic approach applied to the body center of mass was used to estimate ground reaction forces.
• The method utilized only anthropometric and spatiotemporal data during overground sprint acceleration.
• Validation involved comparing the proposed method with force plate measurements in sprinters.

Main Results:

• The field method demonstrated low bias (<5%) and narrow limits of agreement with force plate measurements for key variables.
• High concurrent validity was shown for maximal horizontal force, velocity, power output, and force-velocity relationships.
• Excellent inter-trial reliability was confirmed with low standard errors of measurement (<5%).

Conclusions:

• The proposed simple field method is a valid and reliable tool for assessing sprint running biomechanics.
• This method provides accurate estimations of force- and power-velocity characteristics and mechanical effectiveness.
• The technique is convenient for field use, offering practical applications in sports science and coaching.