Hi Sean, I’m 13 years posterior THR and it’s working for me, I’m 63 and still getting faster. Just ran a 3:06 marathon and yesterday came second in a 52K race. I’m not saying posterior is better than anterior, continue your research and discuss it with the doctor and then decide what’s best for you. Good luck, I hope it turns out as amazing as mine. I also run about 2,000 miles a year with just minor issues.