According to results from the Baltimore Longitudinal Study on walking among older people:

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The Baltimore Longitudinal Study on walking among older people found that factors such as longer stride and cadence are more closely associated with walking speed declines than age itself, and that slower walking is associated with a greater number of falls. This suggests that the mechanics of walking and its changes are more indicative of mobility issues than age alone, and that these changes can lead to increased fall risk.

According to Results from the Baltimore Longitudinal Study on Walking