First full week of training

So my first full week of marathon training went great. I am a little worried about the aches and possible hurdles that I am going to face with a tight IT band and a sore hip. I am keeping an eye on everything and I felt great this week. My hip which has been tight felt awesome on the long run and I made it through my first tempo run. I did ten minutes at a 10 mile pace and then I ramped up the tempo to my 2nd mile and then back to my 10 mile pace for the third mile. I am wondering though how I am going to be able to keep up with the tempo runs when they have to be longer.