Jeffrey Adler

Jeffrey Adler is a Canadian CrossFit athlete. In 2023, he won the title of "Fittest on Earth" at the 2023 CrossFit Games.

CrossFit career
Adler began to train at CrossFit in 2015, and had no previous training in competitive sports. His first world championship bid came at the 2019 CrossFit Games. He was a finalist at the 2020 CrossFit Games, where he placed fifth. He was placed third at the Rogue Invitational in 2021, and again in 2022. At the 2022 CrossFit Games, he was placed fifth.

In 2023 he was the grand champion of the competition, being named the "Fittest Man on Earth", becoming the first non-American male to win the competition since 2009. That year he also placed first at the CrossFit Open.

Personal life
Adler is engaged to his training partner and coach Caroline Lambray, with whom he co-founded a CrossFit gym in Montreal.