@exnavydoc Thank you for confirming and you are right I got the TKR so I could get back to an active lifestyle! That said I have been slowly working my way to running beyond a 5k but will follow your lead (run\walk) with a 10k max. I am 5'7 and now 165 lbs. so the weight loss helped. It does feel weird to run on it, but I can see that my body is adjusting. Biking is fine (even stronger), but I look forward to my first 70.3 late this year or early next year. I plan to do a couple of Olympic distance Tri's this summer. Curios how was your 70.3 run\walk time? I am thinking besides the swim I may need to ramp up my bike time to give me time to finish the run\walk and come in under 8 hours.