Dynamic sitting in infants: Limits of stability.

Background: Limits of stability-defined by the maximum distances a person is willing to reach without falling or changing the base of support-are measures of dynamic balance.

Research Question: What are infants' sitting stability limits in the forward and right directions?

Methods: Twenty-one 6- to 10-month old infants participated in this cross-sectional study. To incentivize infants to reach beyond arm's length, caregivers began by holding a toy close to their infants at shoulder height.