You think about it, women want a firmer chest and arms as men. The walking works the legs, of course, butt, sides, abs, etc. When you do a pushup, notice how much your shoulders and chest work, as well as a little stomach action. A simple pushup does wonders. You're pressing your weight 40 times a day, sets of 10 is what I do. Doesn't sound like much but it works...

The caloric intake as well needs to be around 1600 per day. I like counting calories. No problem with it at all. I have pizza on Fridays, that's the day, and no others. Lunches are tuna salad subs, quarter size, chips, zero water drink. Or mixed in are salads, shared nugget box from Chik Filet. If I'm home then you can always throw in cereal. Banana every day, almost forgot that nugget of gold.

I walk at the end of the day. It gets the metabolism cranked up for when I sleep later that night. Played around with when to walk, and for me it works best evening around 8pm-8:30pm. Try to get in 5 days a week, and weekends if you can.