walking & dilating?

Will walking cause me to dilate at 23 weeks?? fourth pregnancy. I'm not asking TO do it to make me dilate, I'm asking if it will so I don't do it. I like to go for morning walks but don't want to chance doing anything that may make me go into labor early. I don't think I'm high risk, my Dr never said so. I get ultrasounds once a month idk if that means anything