“I looked down and continued, then I was like okay something funny has happened.”
He added: “It was just a pain, a little sprain in the muscle, I couldn’t walk on it.”
However, during the same This Morning appearance, Alex said the rumours that she was “disappointed” to return dancing with Neil are simply untrue.
She said: “That is where social media comes in positively, I put out a tweet saying it’s not true, what people see on the show is not an act!”
Strictly Come Dancing returns Saturday on BBC One at 7:05pm.