Most mornings, he is up at 6am ready to swim some laps.
Every second weekend he completes a mini-triathlon and twice a week he carves out 50 lengths in the Mosgiel pool.
On alternate days, the Mosgiel 29-year-old runs 5km and, now a new tandem bicycle has arrived, he intends spending hours pedalling the roads building towards his next big challenge.
Last year, he completed the Sky Tower Challenge in Auckland and next year he wants to complete a triathlon.
The athlete trains with boundless enthusiasm, friend and coach Dunedin firefighter Richard Yardley says.
What makes Mr Carvalho's training regime remarkable is that he has Down's Syndrome.
While that does not stop him swimming 100 laps in one session, treading water for an hour, or running 10km, it presents basic challenges that he and his support team - comprising Mr Yardley, swimming coach Dianne Holleyman and nurse Christine Twist - work around carefully.
Mr Carvalho had no road sense, so could not cycle on his own, Mr Yardley said.
They had got around that with the tandem bicycle.
"Richard's on the front with my brakes and I'm on the back," Mr Carvalho said.
The specially designed bicycle was donated by the Southern Victoria Trust after an application by the Green Island Lions.
Mr Carvalho's fear of being in deep water was being eased by the sessions in the deep pool at Moana Pool.
Any hiccups along the way were "all practice and learning", Mr Carvalho said.
A date for the triathlon challenge was yet to be set, although it would likely be in February, Mr Yardley said.
It would involve a swim across Lake Dunstan, where Mr Carvalho would join firefighters competing in a duathlon from Cromwell to Alexandra.
While the firefighters went cross-country to Clyde, Mr Yardley and Mr Carvalho would cycle the main road to Clyde and then run from Clyde to Alexandra.
Mr Yardley said if Mr Carvalho completed the challenge, they would then think about entering a competitive triathlon.
"If we could achieve that, it would be amazing."
Whatever happened, there would be no time to rest.
"I'm training Michelle [Harvey, another firefighter] and Richard for the Sky Tower," he said
