The physical environment in family childcare homes and children's physical activity.

Baseline observational data from a trial, so it shows association at one time point and cannot show that changing indoor space causes more activity. The sample was from central North Carolina and was predominantly African American and lower income, so results may not apply to other places or groups. There was low variation in the physical environment and children's activity, which may have made it difficult to detect associations. The study did not measure absolute or per-child indoor square footage, so it cannot give specific indoor space targets. One home was excluded because it had no valid child activity data. The supplied text does not state the number of children analysed. Physical environment was only one part of the activity setting; provider practices, policies, and time for active play were not the focus of these associations.

The authors declared no conflicts of interest. The supplied publication metadata indicates NIH and U.S. government research support, but the article text does not name a funder.

Do not conclude that adding indoor space will increase children's activity. This was a baseline observational association, not a tested intervention.