Mrmoosehead - there are very, very, very few good longterm studies on the effacatiousness of ops to treat FAI, let alone a preventative route.
Common sense has to prevail. The bone growth happens because of something for 80% of "suffers". There are many people with FAI on MRI that don't have symptoms. All I'm saying is that it's not what you've got, but what you do with it. We've loads of good effacatious but anecdotal evidence to support this.
It certainly not about increasing gross movement (which can be hip, back and pelvis) to give more hip range of motion but it's about controlling what you've got, where - more commonly controlling the lumbar spine and not over stretching the hip. I think this is why physio fails and surgery prevails.
Tight calf muscles are a prime cause. Putting a foot into plaster causes tighter calf muscles. If you don't identify why you've got tight calfs (or at least an appropriate length for you and you only) then your PF will limit what you do and how you do it rather than getting rid.....
80% of all FAI's are the product of an unstable, but not necessarily painful, lumbar spine.
FAI symptoms are caused by excessive hip movement which causes either the cam or pincer impingement. OS can shave as much as the bone back, but unless the underlying instability is identified and then corrected, having a painless post op hip doesn't mean that it's fixed.
It also doesn't mean that having an op will not be successful (very) if it's not tailored up with a good functional rehab program that doesn't just concentrate on hip mobility and strength. It must incorporate lumbar spine stability patterning.
Sneglen - don't get too vibed that the MRI showed nothing, it's actually rather good! You've got a functional problem i.e. what you do with it rather than a structural problem - what your stuck with. I'd big up the control issue, and starting slow is a great place to start.
Tiger - agree with lots of what your say. Go for the MRI jennn - sounds very lateral gutter and synovitic, and may need some intervention. If you suspect a SF then a nuclear bone scan is the best option.