Differences in lower-body stiffness between levels of netball competition

Area of Science:

• Biomechanics
• Sports Science
• Athletic Performance

Background:

• Stiffness is a key mechanical factor influencing athletic performance and injury risk in team sports.
• Differences in physical and skill attributes exist across various competition levels.

Purpose of the Study:

• To investigate the relationship between competition level and measures of active and passive stiffness in female netball players.
• To determine if elite netballers exhibit distinct stiffness characteristics compared to lower-ranked players.

Main Methods:

• Measured active vertical stiffness (K(vert)) during hopping and passive stiffness in static positions (lying, standing).
• Assessed 46 female netball players categorized by competition level: elite, sub-elite, representative, and recreational.
• Utilized 1-way analysis of variance to compare stiffness measures across groups.

Main Results:

• Elite players demonstrated significantly higher K(vert) compared to recreational players (p = 0.018).
• Large effect sizes indicated higher K(vert) in elite players versus sub-elite and representative players (d = 1.11).
• Elite players also showed larger differences in passive stiffness compared to lower-ranked counterparts.

Conclusions:

• Elite female netball players possess superior active stiffness compared to less competitive players.
• Differences in stiffness may be a contributing factor to elite performance capabilities.
• Elevated stiffness levels could potentially explain the higher incidence of injuries observed at higher competition levels.