Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Baseline measures of median time to run 550 m (T 550 m) by age (●) compared with the reference 2011 Energize centiles (– – –, 3rd, 15th, 85th and 97th; ——, 50th, median) for two clusters of children in New Zealand, 2013: (a) cluster 1; (b) cluster 2
