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The answer often points to a tool that assists walking while providing stable support—a four-wheeled walking aid. When a person can still walk but is unsteady, a four-wheeled walking aid helps them walk more safely and further, while maintaining physical function, compared to using a wheelchair directly.

The following situations are unsuitable for using a 4-wheeled walking vehicle: • Completely dependent on external support when standing • Unable to maintain upright balance even with legs spread • Immediately leans forward when letting go • Significant balance impairment, indicating severe gait instability