Walking my weight off

Its been six weeks since i did walking as my morning exercise. I no longer jog as prescribed by Auntie Beth (the traditional masseuse). A dear friend joined me in my walk which made it more exciting. She was sedentary for quite some time which is why during our first day of walk, we were on a slow pace but three week later, she got her momentum and now were walking 20 mins/ mile. were doing 40-60 minutes at least 4x a week. For the first three weeks, i lost only two pounds. I was 160 lbs when we started walking and now i am 153. i never imagined i could loose some weight just by walking....