Carragher believes the medical team play a vital role in modern day football and acknowledges that the game has undergone some massive changes since he made his bow way back in 1997.
"It's certainly not like it was when I first started," Carra told liverpoolfc.tv.
"It's not as gruelling as it used to be when there was a lot of running. We used to all run together but now we're split up into different groups.
"The game has moved forward with sports science used more these days. Now everyone is assessed individually.
"There are heart monitors and blood tests, and the readings they take decides what work you are given.
"Everyone is given their own plan to ensure they are in the best shape possible to start the season."
He continued: "The days of coming back overweight and running it off are long gone.
"You would be in trouble if you came back like that.
"We all look after ourselves these days. The way the game is now you have to keep things ticking over. To be honest, I get stuck in my ways anyway with what I eat and drink."