However, by the time they reached age 18, only 73 per cent were active each week with the duration dropping to only 5.5 hours.
The organisation hoped to change the delivery of sport, play and active recreation but was narrowing down on 5- to 11-year-olds initially, Miskimmin said.
Sport and Recreation Minister Grant Robertson and Olympic pole vault bronze medalist Eliza McCartney were also at the announcement.
It was concerning how the numbers of people being active as they got older dropped but this action hoped to make significant change, Robertson said.
However, the new Sport NZ strategy would address those issues.
"It doesn't have to be a full-on competition, playing social basketball, indoor netball, those were the things I did when I stopped playing competitively.
"We've just got to be providing the opportunities [for children] and this is where the strategy sets us up to work with the sporting codes.
"The reality is our world has changed a bit, we don't have as much time as we used to so we've got to be really careful about making sure we include physical activity."