Not that they have much in common. In fact, you probably could not get two sports more dissimilar.
Green (16), a year 11 pupil at Bayfield High School, has enjoyed some good rewards in football and aerobics over the past few months.
He admits aerobics is not your usual sport for secondary schoolboys.
But, encouraged by his two sisters - Abby (14) and Emma (12) - and friends, a group of male school pupils came together to form a group.
The team, known as the Lollypop Girls, ended up winning its section in the Otago-Southland championships and then backed that up with victory at the national championships, although they were the only ones in their class at both championships.
Green said competing in aerobics had been something of an eye opener.
''With some of my friends we thought we would give it a bit of a go. I've always regarded it as being an easy sport,'' he said.
''But no, it is hard. We did not realise how flexible you have to be. There is quite a lot of strength involved too. Just how physically hard it can be on your body. You've got to be quite fit to do it.''
He said there was plenty of support for the aerobics team and there was an intention to carry on next year with a few more pupils keen to get involved.
Most people were curious rather than thinking it was strange for boys to give aerobics a go.
Green, though, does not have time to mull the opinion of others - he has to concentrate on football for the next few months.
The centre-back was selected for a Cross Whites national team which travelled to Sydney for an age grade tournament involving games against Australian state sides. The Cross Whites are a team selected from players across New Zealand, independent of New Zealand Football.
The team had a mixed tournament, winning two games, losing two games and drawing one.
But Green had a highly successful stint on the pitch.
Players were graded in every game by a coach of another team at the tournament and Green was selected in the tournament team.
Winning a place in the tournament team was not simply a pat on the back and a certificate.
His reward was to get a three week trip to Spain and be able to train at the grounds of top Spanish club Valencia next year. A La Liga club, Valencia sits just behind Real Madrid and Barcelona in terms of support in Spain.
''I'm really looking forward to it. It's going to be a lot of fun.''
But heading to Spain does not come cheap and it is going to cost him $8000 to get to Spain. He intends to work hard over the holidays and keep saving for the trip.
Green captained the school's football team and won school awards for his ability with the round ball.
