"I felt really good," Chalobah told chelseafc.com. "The rehab with the staff here (at Cobham) was excellent, I had been working outside for a while, I had done all my conditioning and been managed really carefully.
"Then you've got to step it up. You know that is coming. But in the first drill of that session, my hamstring went again. Man, that was the toughest moment for me. A real hard one. But you've got to understand it, accept it, and then get back to work."
On the recovery, Chalobah also said: "There is nothing I regret about it. Of course, at the start, it's difficult not being able to do what you love. You sort of feel that stress. This was my first big injury, though, so I knew there was something I could take from the experience.
"I tried to find enjoyment in it if you know what I mean. Staying focused, not getting distracted, doing the rehab. You've got to keep the faith too and stay calm.
"I didn't want to get myself too stressed because the more positive you are the more your body is going to feel that. So I would say I worked on myself mentally, physically and emotionally and I'm now feeling even better."