I'm a 57 year old male, not very physically active except some walking and light exercise. Lately if I walk for any distance up or down hills, my right leg hamstring and calves get very sore. I pushed it a little, and they remained sore for a week, like a muscle strain. There's no visible signs, my right leg isn't red or pale, now swelling, it isn't warmer or cooler than my other leg, which feels completely normal.
I was concerned this might be peripheral artery disease, but my doctor says I have a strong pulse in my feet, no unusual sounds in the femoral artery, and no indications of coronary artery disease. So he thinks it is highly unlikely that I have arteriosclerosis in a big vessel in my leg. But it is not going away, my right calf gets a little achy and kind of weak for some minutes after a walk. He suggested it is tendinitis.
I'm not sure where to ask this, but I'd like a second opinion, and I was most worried about PAD, even thought my doctor doesn't think that is my problem.