Have a listen to how Henry got on with the beep test:

I used to hate the word 'fat' but now embrace it. I have lost 4 stone but have put a stone back on, so I have lost 3 stone, thanks to the Aviva Get Fit Action Plan which I started in 2012.

Like Britney Spears I was given a personal trainer, doctor, nutritionist and Sports Psychologist (Enda McNulty who works with BOD) and it worked, but I still had to do the exercise myself. Since losing weight, people smile more, I get a good seat in a restaurant and girls look in my direction (but only look).

When I was fat, I had more girlfriends and more TV work. But it's good to be able to walk into Zara and they have my size. To keep the weight off I do bootcamp with fitsquad.ie, the army defence forces put me through an intense hour from hell, 3 times a week.

It's the end of the first week back to school and most of us have already broken our diets and have put on half a stone over Christmas. But it's the young people we need to worry about with childhood obesity on the rise and kids being driven to and from school and instead of doing exercise will play computer games putting on even more weight.

One school has tried to change this. Oaklands Community College In Edenderry County Offaly holds the title of Ireland's fittest school, winning the Aviva Health Schools Fitness Challenge. 

The beep test:

This test involves continuous running between two lines, 20 metres apart, in time to recorded bleeps. The running speed is increased at approximately 1-minute intervals. Participants should attempt to complete as many runs (shuttles) as possible while keeping in time with the bleeps.

I asked the kids about some tips on the bleep test. It starts slowly but gets faster and faster, if you miss two beeps you are out. The average is 7.5 for girls and 8 to 9 for boys. In Oaklands the boys managed 17 the girls 11.

Aviva Health’s Schools’ Fitness Challenge 2014 is calling on all secondary schools and teachers across the country today to register their interest in the national fitness challenge online at www.avivahealth.ie/fitnesschallenge by the closing date, Friday, 17th January.

The challenge is open to 1st, 2nd and 3rd year pupils this year.