How much walking does it take?

How much walking does it really take to speed things up.. i walk every day im 36weeks 5days 2cm dilated.. not in a rush to get her out just working on getting my body ready for labor and hopefully i want be in the delivery room another 13hrs(like with my first) but maybe quicker this time around with my second(doc said maybe 5hrs) so i hope.... I've been pretty active and doing the right things and sometimes i have tightening while walking and it even wakes me up at night so i just may be on the right track.. any other active mom's that's getting thier body's ready? Whether its your 1st, 2nd, 3rd, 4th, or even 5th +....