"It's always going to be the [Olympic] gold medals," Bolt said to CNN Sport.
"I think that's what really stamped my authority on the sport, you know what I mean, I showed my dominance throughout the years.”
Usain Bolt: Exercise regime still important
"I'm very proud of being the fastest man in the world, but it takes so much to do three back-to-back Olympic and win those, so for me I'm most proud of my gold medals."
He also holds two 4x100m relay golds.
Since retiring from the sport in 2017, Bolt has retained his respect for looking after his body.
"For me, you kind of learn and understand that exercise is very, very important, even just walking just to keep yourself healthy, you know what I mean," he said.
"Over the years, I've learned so much about weight and just nutrition, so I understand the necessary steps I need to take to make sure I'm healthy. I'm having a family and I want to make sure I'm around to see them, you know."