On more comment that I think was missed, for some people working out with moderate to heavy weights can dramatically increase fat lost. It can increase your base metabolic rate making you burn fat easier, and give you the strength and endurance to be more active and push harder in day to day workouts. Stronglifts 5x5 is a wonderful and simple beginners system for building a good foundation of strength.
You don't mention your age or fitness level but as a general rule walking for fitness will help you accomplish SOME of your weight loss. Try to walk at a pace
Of 2.5 to 3.0 miles an hour. The fact that you say you walk 3-6 miles a day tells me you count all walking (shopping etc). If you want to lose weight make a plan. Let's say you have 1 hour daily to devote to walking. Set a starting point and a finish point that you'd like to cover. Let's say you want to walk 3 miles per day. Start out at 2.0 mph and start walking. It should take you 1 1/2 hours to complete your walk. A heart rate monitor would also help you by letting you know if you are in a "training zone" or not. Try to keep your heart rate between 60% or 70% of your maximum heart rate. To get your max heart rate start with 222 then subtract your age. Let's say you're 30 years old. Subtract 30 from 222. Your maximum heart rate would be 192. DO NOT ATTEMPT TO EXERCISE AT THAT RATE. 60% would be 114, 70% 133, 80% 157. If you walk in that zone (114-157) you'll lose weight.
Lifting weights or any kind of strength/resistance training 30 minutes - 1 hour every other day will help your weight loss greatly and cause changes in you body that will please or even amaze you. Of course the standard disclaimers regarding doctor approval etc would apply here. If you have any questions or need assistance in setting up a routine please email ***@****. Good luck!!!!
Running is an even better exercise, but if its too hard it must mean that your not drinking enough water and eating veggies. Also, eating enough calories everyday helps with weight loss. 80% of transforming your body is determined by how you eat, other 20 is genetics and exercise.
Many people find that they cannot lose weight by means of exercise alone. Exercise has many benefits, but weight loss may not be among them. In fact, strenuous exercise can even make it harder to lose weight, for many people. (I keep saying "many people," because it's highly individualized.) Diet, for many people, is much more important for weight loss than exercise is. I myself have lost 40 pounds and have kept it off by means of diet alone, without any significant contribution of exercise. Starving yourself does not work, but changing what you eat does. I recommend that people consider the paleo diet, because that's what has worked for me.
If you are walking 3 to 6 miles per day solely for the purpose of losing weight, consider cutting back to about 2 to 3 miles per day. That will be enough to maintain health without making your body think that it needs to operate at maximum energy efficiency. If you need to walk that much for other reasons, then do what you need to do, but change the kind of food you eat. No sugar, no junk food, no soda pop, and cook your own meals from groceries. Some people even find that they need to eat a bit more, in order to get their bodies out of famine mode. Post back, if you want to discuss. Good luck.