HI Kari,
I am ususally hesitant to answer posts like this, cause I know it will cause a big brew-ha....but here goes.
I had simultaneous bilateral THR in May '05 at 53yrs of age. At that point in my life, I was an avid athlete, running, skiing, biking, rollerskiing, hiking, yoga, weight training ect. But it got harder and harder to enjoy my passions as the pain in my hips progressed. I tried every alternative for 3 yrs with little relief and saw multiple 'specialists'. I finally was sent to one of the top hip surgeons in the country who told me the bottom line was both hips needed to be done within the year!
My good doc spent a lot of time with me and my DH asking us just what we wanted out of the surgery and of course I told him I would love to be able to return to all my athletic endevors. He was pretty comfortable with just about everything but not thrilled about me running. We kinda came to a compromise where I would do only short distance, soft surfaces, cushioned shoes and sock and such. Good enough for me!!
Thanks to my fitness, I breezed through the surgery, setting a record for shortest hospital stay for bilateral THR (2 days), and recovered faster and easier than expected. I did work hard at it, but it paid off. I have been able to return to everything I want. I have also returned to horseback riding, after a 25 yr hiatus, and now own, love and show a lovely Hanovarian mare in eventing.
I certainly do not run like I use to and I do miss those LSD runs with my DH, but I am not afraid to put in 20-30 min a few times/week. At my 2 yr checkup, my hips looked so very good that my OS lifted all restrictions and told me "Go for it!". I have a good friend/neighbor who just had 1 hip done in April and he is back to soft surface running 3-5x/week with his surgeon's blessing. Obviously, not all surgeons would agree with this, but there does seem to be a fair amount of OS who are pretty confident in their work to feel it is acceptable. Sounds like you found one! I think a previous level of fitness is an important point. There is something to be said for a high level of muscle, tendon, ligament involvement in supporting and protecting the prothesis. If you look hard enough, you can find many athletes in all fields with THRs, still going strong after many good years.
A lot also depends on what you want out of life and your new hips. For most folks, running just is not that important. But for some, it is a passion, a way of life. And, NO, swimming or biking cannot replace it. So it is a choice we have to make. It may or may not lead to a shorter life span, but the quality of that life may make the risk worthwhile. I have only to look at my own parents. Dad at 85 with a 35 yr old hip. He continued to professionally ski, mountain climb and be very active until several mini strokes and an arthritic back slowed him down, but hip is still good! Mom at 83 with 2 TKR also very athletic but now sits in a bed with Alzheimers and Parkensons, unable to use her still functioning knees. Yea, genetics!
At any rate, after my long winded speech, you and your surgeon have the final say. I can tell you there is life after THR, wonderful life. If I can give you a bit of advice it would be to get strong before your surgery. Really strong. Cut back on your cardio training and concentrate of strength training your entire body. Best of luck to you and if you can, come back and let us know how you do.
Andrea