Mr Smyth, who uses a wheelchair, said they had professional grade chairs to support them.
He joked: “We were at the very high end of their [the chair’s] capacity, so I’m not convinced they’ve survived completely.
Mr Smyth said his trainer had now given him “strict orders to eat a lot of takeout and play a lot of X Box” for a week to recover.
But after that, he’s planning to get back in the gym, saying he feels “absolutely brilliant”.
When asked what’s next, Mr Smyth said: “I’m a firm believer if you have no mountains, you create your own.
“I’m having this week off, then I’m going to have a chat with my coach about what mountains to do next year – we’re looking at more world records, coming back and defending my title, making it easier than ever.”