The Ultimate Guide To Combining Fasting and Exercise: Everything You Need To Know

Every once in a while he mysteriously pops up on a forum or Facebook thread I’m following, and talks about just having killed some ultra-race out in the middle of nowhere, or completed an epic mountain run…

…on nothing but a bit of butter or coconut oil the day before.

He’s doing some crazy workouts in a fasted state, and yet managing to pull off amazing feats of physical performance.

And furthermore, he’s not a diet hack – the dude actually knows his stuff – with a degree in Chemistry (BSc) and a Masters (MSc) in Sports Nutrition. He works with professional cyclists, triathletes, distance runners and last year worked as Sports Nutritionist to the BMC Professional Cycling Team. Yes, that BMC Professional Cycling Team.

Like I mentioned, Barry is also a competitive endurance athlete himself and races in ultramarathon events. He represented his country at the 2011 World Ultra Trail Championships, and has won several ultra trail marathons, placed 2nd at one of the UK’s toughest 100mile ultras, and has also set national records for trail routes over the Dublin mountains.