Bethany Hamilton and her husband Adam Dirks admit they faced some pretty tough challenges together as contestants on The Amazing Race, airing on CBS tonight. 

The TV show put contestants through their paces in a gruelling 25-day race around the world for their chance of winning a $1m prize. 

In each country, the 11 teams had to complete challenges that stretched their mental as well as physical capabilities.  

Dirks told Inside Edition he knew ahead ofentering the race that it would be a real test for their relationship. The pair are both committed Christians and married last year.  

"The race almost challenges your relationship by fire because you either come out of it stronger or broken apart," said Dirks.

"Bethany was just so strong in every challenge. She was just head-on, not afraid at was coming at her and we just teamed it up pretty well. I'm stoked she was my partner and that she's my wife."

Hamilton had to learn early on in life how to overcome the odds after losing her arm in a shark attack at just 13 years of age.  Despite her physical impairment she went on to fulfil her dream of being a pro-surfer.  

She says she has grown more confident in her abilities as a result of taking part in the show.  

"You learn to be adaptive and especially with travel, you have to adapt to different cultures and whatever it is you're doing. Once we entered the race, it was about quickly adapting to whatever came our way," said Hamilton.

"Working with Adam was great because we had our different strengths ... we knew that we had to strategize different roadblocks and detours in choosing for me to do certain challenges and him do other ones so we could play it safe ...There were moments when I'd get into it but it was pretty challenging with one arm."