I remember, before the 2003 World Cup, I worked extremely hard on my fitness. A great deal of training and dietary discipline. I believe I lost 19 kg. And 19 is the number of runs I scored in the entire tournament.
When I had my first voice lesson I was 15 years old. And I had a really good teacher. This is what made all the difference. A good teacher will teach you the technique, but also how to listen to your voice.