Terry told Chelsea TV: "The training methods are different to what we have been used to the last four years. It's good, though. We are running a lot and did this kind of work under Claudio Ranieri and Gianluca Vialli.
"But it all works in the same way and as long as we're all fit and have no injuries, it will be a good for us.
"Everyone is looking to impress. On the first day the fitness coach told us to go for a gentle 15-minute run, but we all sprinted off as fast as possible.
"Afterwards he told us we should have taken it easy because it was only the first one, but that is the mentality of the players, we all want to impress the new manager.
"It's a clean slate for everybody. Last season is gone and we need to think and build on what we can improve this season."
Terry added: "It's great to be back. When I was on the beach with the kids on holiday the ball came out. They want to play so you never get away from it. It is a good thing really because I love my football and never want to get away from it."