For most people, weight loss is 80% nutrition and just 20% exercise. It's difficult to lose 90 lbs through exercise alone, without also tackling the intake side of things. To put things in context, a rough rule of thumb is that you burn about 100 calories per mile walked, and a pound of fat represents about 3500 calories.
However, walking is a very good exercise - simple and requires no special training or equipment.
If you combine watching your intake with walking 2-3 miles a day, then that can create a good calorie deficit overall.
Also, any good exercise program includes BOTH cardio and strength training. Walking certainly ticks the cardio box, but you should add some strength training as well.
Fitness Minutes: (11,767)
3/9/14 1:26 A
I have done very little other than walking twice a day for about 7wks now. I have watched my calorie intake and done a few things here and there like kettle bell classes and light aerobic here and there. I have lost 38 lbs and 7 inches. I walk two times a day about 15-24 minutes each time. I think it is possible it just depends how quickly you want to lose the weight. Good luck.
Fitness Minutes: (0)
2 3/9/14 12:20 A
I need to lose 90 pounds total. Can you lose that much by walking? If so how much a day?