Finally have answers to why my legs are so tired the past 12 yrs. I have PPMS. My legs feel like 1000lb weights. My balance is terrible. If i excerize them, they feel like noodles. I do not have pain. I am lucky. Its only my legs. My vision, upper strength isn’t affected. I now need a push cart to walk alone. Everyone wants me to try CBD oil and i have 3 different times. Nothing. I have tried the drug Ampyra. Nothing. I don’t know what to do next. Gonna try eliminating sugar and carbs next. I feel like a hopeless cripple now.