Tim Brabants won gold and bronze at the 2008 Beijing Olympics
Olympic canoeing gold medallist and doctor Tim Brabants said his return to full-time training has been tough.
Brabants represented Great Britain in two World Cup events in May and June, after spending 18 months away from the sport after the 2008 Olympics.
He told BBC Radio Nottingham: "It was tough for the first few weeks but it's coming on really well now.
"The first two World Cup events have gone very, very well, so I'm very happy with progress so far."
Brabants won an Olympic gold medal in the K1 1000m in Beijing in 2008 and a bronze in the K1 500m. The Nottingham-trained kayaker also won bronze in the K1 1000m in Sydney in 2000.
Brabants added "Because I've developed a career as a doctor it's important for me to keep that up.
"If I didn't, I'd be wasting all those years at medical school and it's a good break for my mind and for my body.
"Mentally I'm 100% there when it comes to racing but it just takes a while to get my physique back."
The 33-year-old is now focusing his efforts on the 2012 Olympics.
"I'm a lot more involved with the London Olympics in terms of going to meetings and seeing the Olympic Park develop," Brabants said.
"I think we've got quite a unique opportunity to follow the progress of the Olympic Games."
He added his training is mainly based in London but he is still returning to Nottingham occasionally.
"I still come up to Nottingham a lot and still use Holme Pierrepont an awful lot because it's probably one of my favourite places to train," Brabants said.