Is there anyway to make the clutch pedal lighter?

i have a 2007 mustang GT. i dont if its just me but my pedal just seems to stiff. if i drive it around all day i start getting aching pains in my hip and lower back(and im 25, not old). its starting get bad, somtimes it takes a whole week of not driving it until my aching pains heal up. ive been trying to figure somthing out through the internet and books and talking to poeple but just cant figure anything out. Am i just SOL or is there somthing i can do like maybe take it to the dealer to soften the clutch or somthing?