The 32-year-old defender recently returned to first team training after a spell out with a knee problem, to provide manager Steve McClaren with a welcome boost in a new role.
However, he’s revealed that shortly into his return to first team training, he experienced a new problem, which could worry both officials at the club and fans.
“I’ll let you into a little secret. It is quite funny, given how long I’ve been out with my knee, but my back seized up after only 20 seconds of being out there with the first team lads,” he wrote.
“I didn’t want to say anything and I trained for pretty much the whole session with back pain rather than knee pain!”
What should water down any fears is the fact that he trained on and doesn’t seem to have developed a long term problem with his back as a result.
Barker has enough experience, and the memory of a long term spell out of the side, to realise that if something was wrong, he would have pulled up straight away.
It’s encouraging that he’s back in action although it could be some time before he’s back in the side and competing for a regular place in the back four.
Derby are looking at a very important second half to the season and they arguably stand a greater chance of keeping clean sheets and keeping all of their defenders fresh with Barker giving them another option in the squad.
Fingers crossed he doesn’t experience another problem when he gets stuck into his next training session.