Nick Knowles has insisted it is "no great surprise" he is "a bit overweight", but he doesn't "worry" about what he looks like.
The 61-year-old TV presenter recently filmed an adventure for his new travel series 'The Mighty Mississippi with Nick Knowles', and while he admits there are "young" and "super fit" adventurers around such as Bear Grylls, he doesn't lose sleep over appearing on TV in a wetsuit.
He told the Daily Mirror newspaper: "There are lots of people making adventure programmes and a lot of them, like Bear Grylls, are young, they’re super fit.
“I’m 61 now and it’s no great surprise that I’m a bit overweight.
"Even putting on a wetsuit and appearing on telly ... you can’t worry."
The 'DIY SOS' star doesn't worry about "what [he] looks like", and was inspired by a man he met on one of his travel series who told him: "You shouldn’t have to wait for a terminal diagnosis to go and make the most of your life."
He added: "I met a chap who cycled from Mexico down to the bottle of Argentina.
"He said to me, ‘You shouldn’t have to wait for a terminal diagnosis to go and make the most of your life’.
"I couldn’t agree more. You’ll be amazed at what you’re capable of if you push yourself. You can’t worry about what you look like or failing.
"Rather than sit on the sofa or going on a cruise or a package holiday - they’re all good things to do, don’t get me wrong - but I want to get up every day and challenge myself and do something a bit more extraordinary. I will say if I’m terrified or that I don’t fancy this, but then I do it anyway.
"You have to push yourself and try new experiences."
Nick recently revealed he pays for "helicopter extraction cover" when he's out filming his wild TV adventures, because his antics are so dangerous.
He told The Sun newspaper: "You can’t get insurance because a lot of the programming I’m doing, they are such big adventures.
"I actually now pay an enormous amount to ensure I have helicopter extraction cover instead."