Friday 27 May 2016 23:05, UK
England captain Dylan Hartley says one more concussion could end his career.
Hartley has missed 14 weeks of the season over two spells after taking blows to the head, the most recent of which came in the final match of the Six Nations when he was knocked out in the Grand Slam-sealing victory over France.
He was only able to return in Northampton's final match of the season on May 7, making Sunday's Test against Wales at Twickenham the second outing of his comeback.
Now the 30-year-old hooker feels "strong and fit", but he knows a further concussion might have far-reaching implications.
"If I got another lay-off now, I'd be worried. I'd probably start looking at other careers or maybe a long lay-off. Maybe I'll look at my tackling technique too," Hartley said.
"I'd have to ask a specialist. Three in one season would warrant a bit of time off and I would probably take that anyway - take a step back and have a minute.
"It's not something I fear, it's something you deal with when it happens. I won't go into the Wales game worrying about it. I feel confident in my head and have tested it out a few times."
A frustrating period of uncertainty in which Hartley waited for the symptoms to lift so he could begin the return-to play protocols was notable for his need to sleep and inability to complete tasks.
"Basically all I did was mill about. I felt a bit useless, a spare part. And when you stop training you de-condition, you get negative, you feel bad about your body," Hartley said.
"I couldn't run or do anything and spent a lot of time on the couch. It was lethargy, constantly wanting to sleep.
"I'd wake up in the morning, have breakfast and go back to bed, or go into the club to attend a few meetings and then go back to bed. I just didn't have any get up and go."
