Had sore hip after 16 mile run about 4 weeks before marathon. Geared down for a couple days, but soreness was still there. Ran through it for a week or so, and then started my taper. Ran the marathon-and could barely walk to the beer garden. Got on the airplane and could not walk when we landed. Putzed around for a month until my wife insisted I go to Dr. Stress fracture on compression side-not completely displaced but probably 60 percent through-according to the bone scan calcium uptake images. 8 weeks of crutches. 8 weeks of sedentary activity with minimal walking. Cleared to walk and then walk/run. Would walk quarter jog a quarter. Built up to two miles after a month, 3 or 4 days a week. Then went to 1/2 mile alternating (still two miles, 3 or 4 days a week) After 3 months(8 months after injury), could run 2 miles, 4 days a week with minimal pain. A year after injury, I worked to 20 miles a week, 3 to 5 at a time, but still had an aching hip-similar to how it felt between the 16 miler "cracking" and the full marathon "breaking.". It definitely helped to go every other day,.
I got real nervous about this lingering achiness. My doc said it was sciatica-that the bone was fine. The sciatica probably slowed my enthusiasm-which in retrospect was good. I did the injury at age 45-old bones heal slow. 2 years after injury, I reran the injury marathon. A year later, I ran a different, slower marathon course and set my post 40 PR. Take your time. College eligibility is fleeting, but this bone has a poor blood supply. You don't want a hip replacement at 25 if you push it too hard. Try water running on your off days. My experience was the bike aggravated the hip, but perhaps that was my sciatica. Water running was the bomb for me. It seemed to really help the flexibility issues. Also, leg lifts, lying on your side really help. Long quarter mile 6% hills also helped the hip strength-walking the downs though. I've been doing both the lifts and the hills and it really has helped all my knee aches, hip aches, etc. 6 years later, hip still aches a little if the weather is cold and humid, but for the most part I'm fully recovered.