Jonah Lomu is on a mission. The legendary All Black has become an ambassador to the Sanitarium Weet-Bix TRYathlon series in a bid to get kids to get off the couch and get outside.

Each week Rachel Grunwell tries out a different exercise to bring you the lowdown.

Ride a bike and find some amazing places. Be it on a road bike, mountain bike or BMX bike, there are plenty of adventures to be had on two wheels, writes Rachel Grunwell.

The exercise “high” is real and research backs this up. Fitness writer Rachel Grunwell talks to a university expert on the topic.

Danielle Wright learns the rules of the fastest games in town .

We asked Michelle Bridges to share her favourite songs to work out to - the perfect pick me up for Monday afternoon.

Exergaming has been shown to increase energy expenditure under lab conditions, but there's still little evidence to support the long-term benefits.

Who says getting fit has to be a bore? Rachel Grunwell reveals five wacky ways to keep fit.

An ultra marathon runner is battling stomach problems and blisters as she attempts to run for 85 hours non-stop to set a world record and raise funds for charity on the way.

A coroner has recommended that authorities consider strengthening drug testing regimes after an Air Force member died during a training exercise after consuming steroids.

All Blacks star Dan Carter got hearts pumping when he took part in an early morning group workout session in Auckland today.

Doing regular exercise is the most effective single lifestyle choice people can make to reduce their risk of dementia.

Two in five adults underestimate the recommended levels of exercise they should be doing, a British poll suggests.

There's a lot of confusion surrounding food intake and exercise - is it better to eat beforehand or afterwards? And what type of exercise benefits most from eating?

New research shows taking regular exercise when pregnant boosts a newborn baby's brain development.

Danielle Wright meets a group of 4-year-olds preparing early for rugby glory.

Cycling writer Jonathan Kennett shares some of the Great Rides close to home on the Nga Haerenga New Zealand Cycle Trails.

If faint-hearted is not for you, here's ways to toughen up this summer.

Sports fans who fill up on beer and pies at half time need to exercise for hours to burn off the calories, a health charity has warned.

Rachel Grunwell takes to Sydney's streets to complete a half-marathon.

A partially-sighted runner will have Mike McRoberts as his guide through the New York marathon. Rachel Grunwell reports.

Children as young as 3 are joining in crossfit classes, the fitness trend that is gaining converts around the world.

Human health guinea pig Dr Michael Mosley recommends drastically cutting back calories a couple of days each week, but a local expert says this is dangerous advice.