Weight loss and fitness questions

Anonymous
I am 174lbs 5'8 and female (used to be 160...I have really let myself go) and I would like to get down to 160 again but my goal is to get to 135-140lbs and I just want to know how long would it be to lose roughly 35 to 40 pounds? if I am losing a steady one pound per week, also I heard that I should take brisk walks 15-30 minutes at a time because brisk walks/runs are using my fat as the main source of energy but if I am running so fast I can't hold a conversation that it uses my muscle as energy to and it will make me all flabby is that true? also how much should I eat in a day (what is a healthy amount of calories to eat in a day but is also reduced so I am losing weight)

Weight loss and fitness questions
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