Bob Harper gives first interview on 'Today' following February heart attack

Bob Harper is opening up about his February heart attack.

The "Biggest Loser" host revealed in an emotional interview with "Today" on Tuesday what happened, including how extreme his condition was: "I was in full cardiac arrest. My heart stopped. Not to be dramatic, but I was dead. I was on that ground dead."

Doctors gave Harper, 52, a six percent survival rate -- a "widow-maker" -- and said the reason that he's alive today is because there were doctors in the gym when he had suffered the heart attack.

"My coach went into full damage control and ran out and found two doctors," Harper said. "'They started performing CPR, pulled out the AED (automated external defibrillator) and used that twice. And the paramedics got there super quick and jolted me one more time."

Later in the interview, Harper broke down into tears while talking about how happy he is to be alive. The fitness guru's near-death tragedy comes at a surprise to most, including himself, considering he's seen as the picture of perfect health for millions of viewers.

"I don't remember that day at all," Harper said. "I was told I went to the gym like I always do and at the end of the workout I went down to the ground, but it wasn't until about a minute or so later that people realized something was going on."

Two days later, Harper woke up "confused" in a hospital bed.

"I was like Dory from 'Finding Nemo' because I had this short-term memory, so I was reliving the heart attack over and over again."

Harper is now on the road to recovery, and he's been heavily documenting it on social media. From snaps of his Mediterranean-inspired vegan diet to breathing machines which monitor him during workouts, fans can get a peak into his journey.

And his life post-heart attack has been everything but easy. Bob confessed that he's been suffering from depression.

"You really face your mortality and I don't sweat the small stuff any more and I don't sweat the big stuff any more. You know what's important. I care about my friends, I care about my family and I care about my dog."