"I think people don't always appreciate that sports people have, there is another part of our lives that is very important as well to performance," Murray said. "If you're happy away from the court and you're sort of your private and personal life is good, that will help everything."
Murray also said that his back is better following surgery a year and a half ago, and pointed to some training changes by his team as improving his physical condition on the surface. Murray is coached by Amelie Mauresmo and also recently added Jonas Bjorkman, with the two starting together in Munich.
"Obviously Amélie, but my physical trainers and physios for putting in a lot of hard work and making some pretty drastic changes to the way I've trained and tried to understand my body better so that I could stay healthy for longer, and especially on this surface, which I hadn't done the last two or three years," he said.
The two-time Grand Slam champion was also happy with his preparation for the clay-court season. His wedding to his longtime girlfriend, Kim Sears, happened just before Monte Carlo, with Murray deciding not to play the event and train the following week at Barcelona instead of competing at the ATP tournament there.
"I decided to go to train in Barcelona around when the tournament was on because I knew there was going to be a lot of players there to practice with," Murray said before the Madrid final. "I think for me, on this surface it's extremely important to practice with very, very good players, because then I can see the things that I'm not doing well and the things that I need to improve. If you're practicing with players that are much lower ranked, then you can get away with making some mistakes and not hitting the ball so well. I got a lot of good practice there. Practiced with guys like [Pablo] Cuevas, [Pablo] Carreño Busta, and couple of others.
"I learned a lot over the days when I was practicing there, so that was why it was good."
The 27-year-old had prepviously never won at ATP clay tournament.
