Full disclosure-I am 5โ€™11 and 130 lbs soaking wet-I am and always have been pretty lithe. The last time I had continuous physical activity was 2010 when I fulfilled my graduation gym requirement. I have remained thin, but my physical activity has been reduced to mere walking around when I worked in the library. Yesterday, I decided to run around my block, a 3.28 mile loop, which was preluded with two full body pullups. I only was able to do 2 before my upper body tingled. I then went out for the run, and did a jog/walk/jog pace. I am now really feeling it. Sorta sad really.