I...WILL...Get....Them...Over my hips!

I figure if I make this public maybe I'll have someone to answer to! My daily (by that I mean Monday-Friday) will be running up and down my stairs for a warm up and then resistance band exercises taken from http://exercise.about.com/cs/exerciseworkouts/l/blresistanceban.htm & weather permitting a walk up Upland Drive. That should do it! Do you think it is reasonable to think I will drop a pants size atleast by the end of the month? Wish me luck!