The ordeal started on Tuesday when Nathalie, 27, was out training and a car rammed her, apparently delibarately, and knocked her off her bike, breaking her arm.
While she was still dazed from the collision the driver beat her with a stick and threw her into the back seat.
Ms Birli, who has a 14-week-old son, said she lost consciousness for a while, and when she woke up she was naked and tied to an armchair, Krone reported.
“He was full of hatred,” she said. “He blindfolded me, forced me to drink wine and schnapps and he always held a knife in his hand.”
Ms Birli said that, at some point, he held her nose and mouth and she thought he wanted to suffocate her but then stopped and forced her into a bathtub with cold water “to drown me”.
“He blindfolded me, forced me to drink wine and schnapps and he always held a knife in his hand”
She said the situation began to change when she saw that there were a lot of orchids in the house and she expressed her admiration for the plants.
“All of a sudden the attacker was nice to me,” she told Krone.
The man told her that he was a gardener and started talking about his horrible life – “a dead father, a mother addicted to alcohol and girlfriends who betrayed him”, she said.
Ms Birli said that was the moment when she suggested a “deal” to the man.
“‘Let’s pretend it was an accident,’ I offered him, ‘and you let me go’.”
He agreed, took off the duct tape and drove her all the way home, she said.
“I went right into the house, locked the door and called my partner,” she added.
Police managed to track down the suspect and he was arrested early on Wednesday by Austria’s Cobra special forces.
In a Facebook post on Wednesday, Ms Birli said the experience was like a “bad movie” and thanked all who went out looking for her when she was missing.
“Thank God I could liberate myself, and other than a fractured arm and a head injury, I’m fine,” she added.