Physical Characteristics That Differentiate Playing Levels of Male Rugby Union Players: A Systematic Review

Area of Science:

• Sports Science
• Biomechanics
• Human Movement

Background:

• Playing level distinctions in male rugby union athletes' physical attributes are not well-defined.
• Understanding these differences is crucial for talent identification and performance optimization.

Purpose of the Study:

• To systematically review and evaluate the physical characteristics differentiating male rugby union players across professional, semi-professional, and amateur levels.
• To examine the association between these physical characteristics and game performance indicators.

Main Methods:

• A systematic literature search was conducted across five major databases (PubMed, CINAHL, SPORTDiscus, Web of Science, Scopus).
• Fifty-four studies involving adult male rugby union athletes were included in the review.
• Data on strength (heavy dynamic, fast dynamic, isometric, reactive, explosive) and speed (acceleration, maximal sprint) were extracted and analyzed.

Main Results:

• Higher-level athletes consistently showed superior heavy and fast dynamic strength.
• Findings for acceleration and maximal sprint speed were inconsistent across studies.
• Limited evidence supported differences in maximal isometric and reactive strength, while explosive strength remains under-researched.

Conclusions:

• Heavy and fast dynamic strength are key physical differentiators for playing levels in male rugby union.
• These strength measures strongly correlate with game performance indicators.
• Further research is needed on maximal isometric, explosive, and reactive strength for a comprehensive understanding.