Story highlights Kubiak is stepping down after two seasons as the Denver Broncos' head coach

He coached Broncos to a 24-10 win over the Carolina Panthers in Super Bowl 50

(CNN) Less than a year after winning the Super Bowl, Gary Kubiak is leaving his position as Denver Broncos head coach.

At a press conference on Monday, an emotional Kubiak said that he was retiring from coaching because the demands of the job were becoming too much for him.

"Coaching is a very demanding business," he said. "Tough business. And I've always prided myself. You know, I've been a head coach for 10 years. And each of us as coaches... we all have a routine. We all have a way we go about doing things, and I've had my routine for a long time. And I've always taken a lot of pride that I could coach a football team, be there for the players, be there for the coaches, be there for the organization, do a game plan, call some plays on Sunday. I've always taken a lot of pride in the fact that I could do all of those things.

"But this year I haven't been able to do that. It's been tough. And for the first time I've had to tell myself, 'Hey, you can't do that anymore.'"

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Kubiak, 55, has had more than one health scare in his career. He missed Denver's game on October 13 against the San Diego Chargers because of a complex migraine condition. When he was head coach of the Houston Texans, Kubiak suffered a transient ischemic attack -- commonly known as a mini-stroke -- when he collapsed during a game in 2013.

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