Leg Weakness Around Knees and Calf

For the last week or so, i have been feeling weakness around my knees and calfs.  I was, for the longest time, wearing the sketchers shape up shoes, that simulate walking bare foot in the sand (have a curved out sole) 7 months to be precise.  I have checked my sugar levels, blood pressure, heart rate and rhythm of my heart, all normal.  I do have controlled PVC's, but have been deemed harmless and controlled with meds.  No swelling or discoloration.  

Could it have been the months of wearing those shoes that finally did it in?  I dont feel like im gonna pass out, i can still move and walk no issues.

Any suggestions?

[JustinDobbs23]

Could be, but If that were the case you'd see these shoes taken off the market. So I would rule that part out for sure. Possibly do you have restless leg syndrome or do you move your legs alot, or to music? Run alot?