Bruce Parry is a bit of a wuss. You might wonder how this could be said of a former Marine-turned-TV explorer who is willing to endure ceremonial cuttings, drinking cow's blood and ingesting foul-tasting hallucinogenic drugs for the award-winning BBC series Tribe.
But the 37-year-old admits as much himself. When he was first asked to head up the British team in Blizzard: Race To The Pole, a televised recreation of the 1911 race to the North Pole between Brit Robert Falcon Scott and the Norwegian Roald Amundsen, Bruce's immediate reaction was to say no.
"I hate the cold," he says. "Beyond hate. There's nothing good about the cold. And it just looked miserable.
"Who would want to go and live in tweeds in minus 30, pulling a sledge full of bricks? What's that all about?"
Bruce was worried about his level of fitness as well. While he's an undeniably fit guy, there are, he says, different types of fitness, and he was concerned he was going to make a fool of himself in front of both his team and millions of viewers.
"I just thought I would look crap because I'm with all these fantastically fit Arctic dudes," he says.
"I may be fit to a degree, but there's shot-putt fitness and marathon fitness and one is better at pulling sledges than the other. I'm definitely the marathon type and I didn't know if I was going to be able to do it."
Having decided to do it anyway, you would have thought Bruce would have thrown himself into a gruelling schedule of training in order to prepare himself for the trip. But no.
"I didn't do any training," he admits.
"I went to Northumberland and stayed at a house overlooking a beach for three months, thinking I'd run up and down the beach every day. But it was too cold.
"I did about two hours in three months. I used to get up in the morning, put my gym gear on, look out the window and go, 'Ooh it's a bit wet'," he laughs.
"Then I'd potter around the house all day."
Don't get him wrong, Bruce says he loves exercise - "When I go for a run I always think, why don't I do this more often?" he says.
That's why he enjoyed being a Marine so much - there he had someone shouting at him to get up and run. But left to his own devices he has no motivation.
"I hired a personal trainer when I lived in Cardiff a couple years ago," he says, "and I used to lie to him. He used to come around and ring the doorbell, then he'd ring my phone. I'd be in bed upstairs telling him I was in London working."
It's good to hear that there's this side to Bruce, that he has his weaknesses like any of us, because on paper, and on television, he seems like a too-good-to-be-true, all-action, adventurous human being who isn't fazed by anything the world presents him.
Of course to an extent he is that person. In the new series of Tribe, which follows last year's award-winning first series, Bruce once again braves the unknown in Africa to spend time with another set of indigenous tribes.
He spends night after night sleeping in the open air picking ticks off himself as he gets to know the tribes, and with the first tribe, the Nyangatom, experiences first-hand what it's like to spear a cow.
But that's not all. During his stay with the Dassenatch he goes on a crocodile hunt, and during his time with the Hamar tribe has to prove his manhood by stripping naked, covering himself in cow dung and running across the backs of a long line of bulls.
Once again he proves capable of throwing himself into experiences that most of us would naturally baulk at. What exactly is it about him that allows him to override his fear?
"Well, it's very nice of you to say that, but I actually think that the answer is nothing," he says.
"I genuinely just think that I have one of the best jobs on the planet and other than that I am an everyman. I don't feel for a second that there's anything special about me.
"All I can say that's different is I have a wealth of very fun stories that just come from doing what I do. If you asked me to list qualities that help, well obviously humility, respect, and humbleness when you're living with a community and just being nice and friendly.
"That's what everyone likes from a visitor don't they? I do get a lot of cred for this and it's kind of unfounded. The ability to drink the blood and eat the bugs and all the rest of it, people say they could never do that, but the truth is I'm paid to do it. It's my job."
It's a job he's trained well for. At 18 he joined the Marines where he specialised as a physical training instructor. His six-year career ended on a high working as the head of all the physical training aspects of the UK's Commando Training Syllabus.
After quitting the Marines, he studied PE and sport in Loughborough, and at the same time started going on expeditions. He then quit his studies to go on expeditions full time, taking in places as far flung as Borneo, Sumatra, Sulawesi and Java.
He then took an unlikely diversion into the world of TV and film, where he became a runner, making tea for actors and pop stars, before becoming an assistant director on feature films, commercials and pop videos for the likes of Blur, Chemical Brothers, and All Saints.
But his heart lay in exploring and at the turn of the century he quit the TV and film industry and headed up a little-explored mountain on New Guinea Island with his friend Mark Anstice. They took a camera, and met uncontacted peoples on the way.
The BBC bought the footage and showed it as part of their Extreme Lives series, and Bruce the TV star was born. He then filmed two award-winning children's series, taking unsuspecting kids into the jungle or the desert.
Then Tribe came along. "Completely random career changes all over the place," laughs Bruce.
And really not a wuss's career either, thinking about it. But just how did he cope with the cold in the Arctic?
"Well, you have no option," he says.
"I actually can resist things and I can cope quite well, but I just need to be pushed to do these things. It was all right, but I didn't like it." n Tribe is on BBC Two from Sunday July 16. Blizzard: Race To The Pole is on BBC Two this summer, and the accompanying book is published by BBC Worldwide on Thursday July 27.