Northern Ireland's leader says he suffered a heart attack this week because he lives on junk food, gets too little sleep and no exercise.

In his first comments since being released from hospital, First Minister Peter Robinson said he blames "myself and nobody but myself" for Monday's brush with death.

The 66-year-old spoke Saturday at the Irish Open golf tournament.

Robinson said he had his heart attack after sending emails at 4 a.m. on what was a holiday. He said his exercise involves being driven from door to door.

"If you looked at my diet you would cringe. It's all around snacking and fast foods and all the things that you shouldn't do," he said.

Robinson said doctors placed stents in three major arteries to improve blood flow.