Lorenzo struggled last season, as he struggled to recover from surgeries in the off season. He is now determined to make up for the poor season and compete for the world title in 2015.
The Spaniard said: "I have never trained as much as I did this winter. The feelings are good. Last year I finished the season very well and now I want to always finish on the podium and we'll see where I'll be at the end of the year.
"In 2013 the operations in the winter demanded a lot of my strength. Maybe I expended too much energy. I also found that I had to plan the preparation better in winter. In this case, I might have made a few mistakes in the past. But I never make mistakes twice.
"For 2015 I will be in much better shape. I am currently training extremely hard. I have just returned from Andorra, where I went skiing in the mountains. I feel very good. Since I graduated to the MotoGP class I've never been so fit. I am perfectly prepared for the test in Sepang. This year was all planned out perfectly and I have worked on all of my weaknesses."
Lorenzo added: "The last season ended pretty well. I collected the most points in the second half of the season but I only finished third overall. Marc (Marquez) had a very strong season and Valentino (Rossi) was stronger than I expected. I have to continue in 2015 as I did at the end of 2014 but I have to win more. I want to fight for the world title."