Greg Glassman, founder and CEO of CrossFit, speaking at the Iconic Conference in Denver on June 15, 2016

CrossFit CEO Greg Glassman is the father of one of the fastest-growing movements in fitness, but he just "doesn't get" another segment of it that has surged in recent years: fitness trackers.

During a CNBC Facebook live chat, Glassman was asked to share his thoughts on all of the products that try to moderate people's health, such as Fitbit and Jawbone, and simply responded, "Junk drawer."

"I don't get any of them," he said.