"When turning back is about as difficult as pressing on, you press on because you've got an objective - especially when they told me that I'd just set a record: The oldest guy to the South Pole.
"See now it was worth it - really,'' he laughed.
Last week, Aldrin's manager, Christina Korp, posted photos of the famous astronaut in hospital and later on a plane home.
She wrote on Twitter that they hoped to be back in New Zealand at some point, for a different reason, however.
"Bye, bye New Zealand! Hope to see you again! But next time for vacation not evacuation.''
Yesterday, Aldrin shared a photo of himself on his official Twitter page at the Apollo/Saturn V Centre.
"I'm feeling better and my rocket is ready for launch.''
He finished his Tweet with the #GYATM hashtag, which stands for "Get your ass to Mars.''
Aldrin, who hopes humans will get to to Mars by 2035, is also pictured sporting a T-shirt with a picture of an astronaut holding an American flag standing on a red planet.
The logo reads: "From America to Mars.''