I have been running a small campaign which you can read about on my website http://robin.net.nz
The object briefly is to build SMALL activity centres around the country for exercise, social happening and more. They would increase physical fitness but also act as a focal point so that people of different ages and types could interact. They would also help people to eat sensibly and live healthier lives.
Contrast this with such grandiose schemes as the Northland Regional Council's plan to have all ratepayers (up to Cape Reinga!) fund a large Events Stadium for the elite in Whangarei. I believe that we need people-sized centres, as they do in the Shetland Isles (details on the website above), some of them on islands with less than 1000 people. And the cost of travelling will be much less!
You might like to look at a website from the part of the UK furthest from New Zealand, the Shetland Isles. On even islands with less than 1000 population there are Leisure Centres with a small pool: see
These do more than help Shetlanders keep fit: they act as social centres and places where the principles of healthy living, healthy eating are disseminated.