I don't claim to be knowledgeable about theology. Most of my knowledge comes out of my experience and the lessons in the Bible. Every Sunday I'm home I teach 45 minutes and we boiled them down to one page for the new book 'Through the Year with Jimmy Carter.'
At least for soccer players it comes down to a blend of two types of fitness - your base endurance which comes from longer distance running and your speed which comes from sprint-based workouts.