Thursday Workouts

After my do nothing day yesterday, it felt good to be beat up by my trainer again :)

Trainer - 4 stations, 8 reps, 6 rounds,

back squat to 12" box (75lbs 2 rounds, 85 for 1, 95 for 3)

45lb kettle bell swing

walking pushups

30lb one arm row

Then the plan was for me to do a mile at a 9:30 pace, but at a half mile I had to walk then finished at 10min pace.  Grrrr

Then a 30 min kickboxing class

So a question -  My only running is with my trainer on the TM or in 5k / 10k road races.  Outside I do a 10-10:30 mile, but it isn't a steady pace... I may run fast, slow to a jog, faster, etc and it just all averages out.  To build endurance so I can maintain a pace the whole time, should I increase distance at a slower pace, or increase pace at a lower distance?  I emailed my trainer but just curious