Weakness in knee flexion and toe walking bilaterally. No weakness without resistance Weakness present with resistance against and with gravity Knee, hip, upper limb and all other movements have 5/5 power. This happened for the first time 45 days back. Had blood tests done. Electrolytes, TFT, vitamins all normal. Nerve conduction studies normal. Relieved by rest in 2 days. Happened again a week later. And since then happening on and off every few days. I noticed it happens every time I climb stairs up and down but not sure about it Not associated with pain, tingling, needles pin sensation. No loss of sensation No h/o diarrhoea, fever, dm, htn