Navalny made his first public appearance on Wednesday after being discharged from a Berlin hospital where Germany said he was being treated for poisoning by a potentially deadly nerve agent.
“He is still not 100% how he was before,” Jaka Bizilj, founder of the Cinema for Peace Foundation, told foreign journalists in Berlin on Thursday.
“When we got the first reports, we got the impression he had made a fast recovery and was fit but we have to be careful,” he said. “I think he will need at least a month to be fit again.”
Bizilj, who had previously helped anti-Kremlin activist Pyotr Verzilov get treatment in Germany after a suspected poisoning, said he had no doubt Navalny would return to Russia.
“His chief of staff has made clear there is no doubt he wants to go back to Russia,” he said, adding he had not seen Navalny in person but was in contact with his team and family.