Talk to General Physician on Leg Muscle Very Weak

Hello, I'm 28 years old man, height 175 sm, weight74 kg. In recently i can't run, can't jump, and when walking on roads sometimes fall down. but i don't have any pain. also very difficulty climb to stairs. I gave anylasis follow by nerve Doctor's advice. you can see result from below ..... AST 155.99 ALT 211.43 but i don't have liver B, C virus. Creatine Kinase (CKL) 6869.00 U/L Myoglobin Gen.2(Myo) 547.90 ng/mL

Also we still couldn't know what is reason my leg muscle power very low /weak/.