Dancers exhibit decreases in postural control after fatigue

Area of Science:

• Dance science
• Biomechanics
• Motor control

Background:

• Dancers require superior postural control for executing complex movements and preventing injuries.
• Fatigue is a common issue in dancers, potentially compromising balance and increasing injury susceptibility.

Purpose of the Study:

• To investigate the impact of a dance-specific fatigue protocol on static postural control in healthy dancers.
• To identify potential differences in fatigue effects between dominant and non-dominant legs.

Main Methods:

• Utilized a 12-camera motion analysis system and a force plate to gather kinematic and kinetic data.
• Assessed static postural control in a passé stance before and after a dance-specific fatigue protocol in 15 dancers.

Main Results:

• Significant increases in center of pressure displacement (anterior-posterior and medio-lateral) and sway area were observed post-fatigue, especially in the non-dominant leg.
• Increased joint excursions were noted at the hip (sagittal and frontal planes) and knee (sagittal plane) for both legs, and at the non-dominant ankle (sagittal plane).
• The dominant leg demonstrated greater resistance to fatigue compared to the non-dominant leg.

Conclusions:

• A dance-specific fatigue protocol significantly degrades static postural control in dancers.
• The non-dominant leg is more susceptible to fatigue-induced postural deficits than the dominant leg.
• Integrating fatigue-inducing stability exercises into dance training may improve balance recovery and mitigate injury risk.