Ethan Zohn is coming off three months of intense chemotherapy, but in his latest video diary for PEOPLE.com he's running in Central Park.
The effusive Survivor: Africa winner, who was diagnosed with Stage 2 Hodgkin's disease in April, is preparing a team to participate in November's New York City Marathon to support his HIV/AIDS charity, Grassroot Soccer.
"I haven't decided if I'm actually going to run the marathon," says Zohn, who recently completed a chemotherapy regimen that left him nauseous, hairless and very often sleepless. Still, he has stayed true to his vow to remain positive throughout his fight against the disease, and is looking to the future.
Zohn is awaiting test results to see if he's fit enough to attempt to tackle the grueling course. But even being there for his team's training run "gets me excited, gets me pumped up that I might actually be able to run this marathon," he says.
Keep up with Ethan’s progress every Thursday on PEOPLE.com