A Compound Hop Index for Assessing Soccer Players' Performance.

Area of Science:

• Sports Medicine
• Biomechanics
• Athletic Performance Analysis

Background:

• Single-leg hop tests are crucial functional performance measures for athletes.
• Managing large datasets from hop tests presents a challenge in performance analysis.
• There is a need for methods to condense hop test data without reducing testing frequency.

Purpose of the Study:

• To develop and validate a single score, the Compound Hop Index (CHI), for summarizing hop test battery data.
• To demonstrate the utility of CHI using data from a professional soccer team.
• To provide a method for simplifying and organizing athletic functional performance data.

Main Methods:

• A professional soccer team completed a battery of single-leg hop tests (single hop, triple hop for distance, 6-meter timed hop).
• Limb Symmetry Indexes and normalized distances/times were calculated for each leg.
• Data were standardized to z-scores, averaged, and combined to form the CHI.

Main Results:

• The Compound Hop Index (CHI) was successfully developed by averaging standardized z-scores from hop tests.
• CHI provides a consolidated measure of functional performance from multiple hop tests.
• The method effectively reduces, clarifies, and organizes complex hop performance data.

Conclusions:

• The Compound Hop Index (CHI) offers a novel and effective way to summarize athletic hop test performance.
• CHI simplifies data analysis, aiding in the interpretation of functional performance in athletes.
• This approach facilitates efficient data management in sports science and medicine.