The energetic right-back resumed his role in the Reds’ defence for Tuesday's Capital One Cup defeat to Sunderland at the Stadium of Light. Previously, he missed a trio of games against Norwich, Spurs and Swansea having been injured in the Boxing Day clash at Hull.
"It's good that I'm back from injury, obviously the results haven't been particularly good, but I'm happy to be back playing again," the Brazilian told MUTV.
"When you are injured you can't help out, I saw the team lose two games (Spurs in the league and Swansea in the FA Cup) and there was nothing that I could do. You're always looking to get back on track and help the team to win."
Despite a schedule that takes its physical toll on even the most finely tuned of athletes, Rafael believes that he has become accustomed to the demands of the Reds' fixture list.
"Since I arrived at United it's changed completely for me," the defender stated. "When I was back in Brazil you may play the same amount of games over a season but not at the same intensity. I've started to deal with that since I came to United."
"I've changed a lot since coming here, I've changed my mentality. I've played in the English league for six years and of course you have to adapt. I've had to alter slightly the way I play."