Jason Kelce Mitchell Leff/Getty Images

After 13 years in the NFL, Jason Kelce revealed some routines are harder to break than others.

Calling himself a “creature of habit,” Jason, 36, said there has been “zero” difference in his life since announcing his retirement on March 4.

“I’ve actually still gone down to the facility to get a couple of weightlifting sessions in,” Jason told brother Travis Kelce on the Wednesday, March 13, episode of their podcast, “New Heights.”

However, Jason acknowledged that his unaltered way of living won’t last forever.

“I’m assuming once organized team activities start up, especially once training camp and the season start rolling around, it will really start to hit a little bit more,” he said.

Organized team activities (OTAs) will kick-start in late May or early June before training camps open in mid-to-late July.

Jason acknowledged it’s been an overwhelming couple of weeks since announcing his NFL exit, with the former Eagles center receiving “over a thousand text messages.”

“It was awesome hearing from guys that I haven’t talked to,” Jason gushed, “or teammates I haven’t talked to in years that reached out.”

When Travis, 34, asked if Jason was still busy responding to all the messages, Jason said it was quite the difficult task.

“It was so hard getting through it that I did it in different days,” he explained. “I hope I got back to you if you did reach out. I appreciate it so much.”

Jason said he especially appreciated hearing from fellow retired players because “they know how life-changing it is.”