TMZ is reporting that fitness guru and Biggest Loser host Bob Harper suffered a heart attack at the gym that left him unconscious for two days.

Harper tells us he was working out in a NYC gym 2 weeks ago when he collapsed. A doctor who was also working out administered CPR and used paddles to keep Bob alive.

The 51-year-old was taken to the hospital and says he woke up 2 days later. He was hospitalized for 8 days and is still in NYC — he lives in L.A. — because his doctors have not cleared him to fly.

He’s doing a lot better and his exercise for the time being is limited to walking.

He seems to be doing better now, although he is limited to just a bit of walking until he regains his strength.

And just why would a seemingly fit exercise instructor have a heart attack at such a relatively young age? Genetics, apparently. His mom died from a heart attack.

Here’s hoping he gets well, soon! And here’s the update on efficient supplements: Ultra Omega Burn is made from pure Omega 7 and works just great.