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A Training Program Using an Agility Ladder for Community-Dwelling Older Adults

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Skill-level differences in a dynamic agility-stability trade-off in dance.

Michael Chang¹, Nicholas O'Dwyer², Mark Halaki³

¹Charles Sturt University, Australia.

Human Movement Science

|May 25, 2026

Summary

This summary is machine-generated.

Dance expertise enhances coordination by strengthening and tuning movement synergies, balancing agility and stability. Experts show refined control over joint variability for complex whole-body actions like the Cha-Cha-Cha.

Keywords:

Controlled variables Coordination refinement Hierarchical control Phase modulation Selective stabilisation

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Area of Science:

Motor control and learning
Biomechanics of dance
Human movement analysis

Background:

Understanding how motor skill expertise influences the coordination of complex movements is crucial.
Dancers must manage joint variability to maintain stability of key body segments during intricate actions.

Purpose of the Study:

To investigate how dancers of varying skill levels (beginners, intermediates, experts) coordinate joint variability.
To determine if coordination strategies change across different phases of a complex dance cycle.
To examine the trade-off between stability and agility in skilled dancers.

Main Methods:

Whole-body kinematics of 29 Latin Ballroom dancers performing the Cha-Cha-Cha were recorded.
Uncontrolled manifold (UCM) analysis quantified synergy strength (ΔV') for key body segment centers of mass (CoM).
Linear mixed-effects modeling analyzed the effects of skill level, controlled variable, and cycle phase on coordination.

Main Results:

Synergy strength increased with skill level, from beginners to experts.
The feet, head, and whole-body CoM were stabilized more than the hands.
Synergy strength decreased during demanding phases, allowing for agility, with experts showing greater temporal modulation.

Conclusions:

Dance expertise refines coordination through strengthened and temporally tuned stabilizing synergies.
Skilled dancers dynamically manage the agility-stability trade-off during complex rhythmic movements.
Expertise involves optimizing a low-dimensional coordination architecture for efficient whole-body action.