Hello Doctor, I have issue like all the Joint muscle under arm neck, lower abdomen, buttocks, calf muscle are week and un tight as normal muscle person , sometimes it's getting tight some time over relaxed due to that elastic of muscle is more so due to that difficult to sit , take any weigh and unbalance while walk due to buttocks muscle weekeness , even if it do strength exercise it will ok on the day only next day same elastic system only so my Ck test before last year was 127 out of 200 not sure what could be the reason, my chest muscle whatever muscle not building it to fat for long period due to that no thick tone on chest and buttock or calf ...blood sugar under control...