Reason for excessive muscle weakness is low Human Growth Hormone. When that is low, muscular tissue are reabsorbed and changed with fat.Low HGH is quite typical in hypos, although physicians hardly ever analyze for it. We need T3 to create HGH, and we need HGH to turn T4 to T3, so it's a bit of a viscous group.Do you have higher gums? Have your mouth shrunk? Do you have strong collections on your experience, and 'bat wings'If you have any of these then your HGH could be low.Tests for HGH are not efficient so one has to analyze for IGF1. The two are linked.Don't know if that's any help, but I believed I'd toss that in there.