>Cross Training>Push ups and back pain
Roads were made for journeys...
2013 Goal: Make 3:00:16 go away - FAIL.
2014 Goal: Make 3:00:16 go away.
As people always say with running, just do less of them.
It sounds like your lower back is the weak link, so do half or a third of the amount of core work you were doing, and build up.
It works with any physical conditioning workouts, not just running. I was talking to a guy I know who does powerlifting a few years ago and was amazed at how similar the training periodization cycles were.
"Today I broke my record for most consecutive days lived!"
Run until the trail runs out.
Race Less Train More
Ana Trason "Living Her Life"
"The Marble in The Groove"
Alternately, you could do knee push-ups, which although easier on the arms are also easier on the back.
Best Present Ever