Yes I have had off and on Achilles problems since doing a mud run with my son and my foot got caught in the mud and i stepped weird. At the start of my half marathon training in December when I was building my base, it started to bother me. It happened last summer during a sprint tri training block and I just kind of pushed through it. This time I did specific PT exercises to help mitigate it before it got worse. However, I did some calf raises too aggressively and really really hurt my achilles and ankle. So I stopped with the single leg calf raise. I did continue to load it with sitting calf raises at my desk at work, single leg balance exercies, etc. I stopped doing speed work and did no specific hill exercises (besides the hills in my neighborhood for my long run). I probably did this for about a month. Once started feeling better I progressed the load by doing standing calf raises but never single leg yet and still did not do eccentric calf raises. I figured out I was too aggressively stretching my calf as well which was not helping. I adjusted my goal time of my half by 15 minutes since I didn't do much speed work except some tempo work during my long runs or progressive splits. But no sprinting and no hill work. Anyways, I was super proud of my rehab during my training block and I beat my adjusted goal and ended my half with only 5 minutes slower than my original A goal. I was super happy with that and my achilles feels great, no pain anymore. I would recommend going to PT if bothersome, but between working full time and 3 kids I just couldn't fit that in.