hi, my question is that i started doing the stairs recently i work on the 6th floor and i start from the 1st floor, well at first when i walk up the stairs my legs would hurt actually the top portion (my thighs) and now from hurting my legs will just start getting heavy where i can't seem to move it anymore and it happens when i reach the 4th floor and its only while doing the stairs when i reach the 6th floor my legs will be okay alittle swore but goes back to normal. should i be doing something to preventt this?



Thanks

Melissa