Different Dual-Task Paradigm Reduce Postural Control Ability and Dynamic Stability of Healthy Young Adults during...

Area of Science:

• Biomechanics
• Human Movement Science
• Gerontology

Background:

• Stair descent is a complex motor task requiring significant postural control and dynamic stability.
• Dual-tasking, involving concurrent performance of a motor and cognitive or manual task, is common in daily life but can impair performance.
• The impact of different dual-task paradigms on stair descent in young adults remains incompletely understood.

Purpose of the Study:

• To compare the effects of single-task, cognitive dual-task, and manual dual-task paradigms on postural control and dynamic stability during stair descent in young adults.
• To investigate whether cognitive and manual dual-tasks have differential impacts on lower limb mechanics and stability during stair descent.

Main Methods:

• Twenty young adults without regular exercise habits were recruited.
• Participants performed stair descent under three conditions: single-task, cognitive dual-task, and manual dual-task.
• Kinematic and kinetic data were collected using motion analysis and force plates to assess postural control and dynamic stability.

Main Results:

• Lower limb joint moment variations showed similar trends across all three task paradigms.
• Both cognitive and manual dual-task paradigms significantly reduced mechanical parameters compared to single-tasking.
• Dynamic stability during stair descent was significantly diminished under both dual-task conditions.

Conclusions:

• Dual-tasking during stair descent, whether cognitive or manual, increases the risk of falls in young adults.
• Cognitive and manual dual-tasks exert comparable detrimental effects on postural control and dynamic stability during stair descent.
• It is advisable for individuals to avoid performing dual tasks while descending stairs to mitigate fall risk.