Very cool Hector...
I used to walk 5 miles a day, 4 times a week.
That, added with a diet lost me over 150 pounds in less then 2 years.
Unfortunately, when I got down to the weight I wanted to be at, I wasn't happy-- as a matter of fact, I was miserable.... I love food too much.
I found I had to exercise and constantly starve myself just to maintain my weight.
Recently I gave up on it all.
I hope your system works for you.