Dual-task effect on postural control in high-level competitive dancers.

Area of Science:

• Neuroscience
• Biomechanics
• Motor Control

Background:

• Postural control is crucial for daily activities and athletic performance.
• Cognitive load significantly impacts balance, especially in non-athletes.
• Understanding group differences in dual-tasking balance can inform training strategies.

Purpose of the Study:

• To compare the postural control of competitive dancers and non-dancers under single-task and dual-task conditions.
• To investigate how cognitive load affects balance parameters in dancers versus controls.
• To determine if dance training enhances automaticity in postural control.

Main Methods:

• Participants included 33 competitive dancers and 22 non-dancers (ages 16-27).
• Balance was assessed using a force plate, measuring centre-of-pressure (sway) variability, mean speed, frequency, and sample entropy.
• Two conditions were tested: quiet stance (single task) and quiet stance with a concurrent mental task (dual task).

Main Results:

• Dual-tasking similarly affected medio-lateral sway in both groups, increasing automaticity.
• In the antero-posterior plane, dual-tasking increased sway frequency and sample entropy in dancers without performance decline.
• Non-dancers' postural control was negatively impacted by reduced cognitive investment during dual-tasking.
• High correlations between sway sample entropy and frequency suggest they measure similar aspects of postural control.

Conclusions:

• Dancers demonstrate enhanced automatic postural control in the antero-posterior plane compared to non-dancers when cognitive demands increase.
• Dance training may facilitate better cognitive-motor integration, improving stability during complex tasks.
• Postural control mechanisms are largely similar between dancers and non-dancers, but training confers specific advantages.