The official MotoGP website has released video footage of injured MotoGP rookie Hiroshi Aoyama training in the gym and swimming.
Aoyama fractured his T12 vertebra during a warm-up highside at Silverstone, meaning the last ever 250cc world champion has missed the last five races.
During the video Aoyama says he would like to try riding his bike, but admits his back is only at "70 or 80%" strength.
"I think my arms and legs are almost as they were before, but my back maybe is at 70% or 80%, so not 100% yet. When I do some exercise I always need the support corset so when I can exercise without that I will be at more or less 90%, and then I can start to ride the bike,” he said.
“It is a little bit strange because I have never missed any races in the last six years. I have been watching the races and it is a bit stressful, but somehow good to take a bit of rest after last season and I have enough motivation to try again now.”
Aoyama's place at Interwetten Honda was initially taken by test rider Kousuke Akiyoshi, then Alex de Angelis, who will continue on the RC212V until Aoyama returns.
Aoyama does not mention a possible return date, but rumours had suggested he might not be back until his home Japanese Grand Prix on October 3.