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There is no guaranteed way to lose weight through walking and exercise alone. While exercise can help you lose weight, it is not the only factor involved. You also need to create a calorie deficit, which means burning more calories than you consume.

The amount of calories you burn through exercise depends on a number of factors, including your weight, your activity level, and the intensity of your workout. A general rule of thumb is that you will burn about 100 calories per mile walked. So, if you walk 3 miles, you will burn about 300 calories.

However, it is important to note that your body will only burn fat after it has used up its glycogen stores. Glycogen is a type of carbohydrate that is stored in your muscles and liver. When you exercise, your body will first use glycogen for energy. Once your glycogen stores are depleted, your body will then start to burn fat for energy.

This is why it is important to eat a healthy diet when you are trying to lose weight through exercise. A healthy diet will help you to maintain your glycogen stores and will also help you to burn fat more efficiently.

Here are some tips for losing weight through exercise:

• Aim for at least 30 minutes of moderate-intensity exercise most days of the week.

• Include a variety of exercises in your routine, such as walking, running, swimming, and biking.

• Gradually increase the intensity and duration of your workouts over time.

• Eat a healthy diet that is low in processed foods and high in fruits, vegetables, and whole grains.

• Get enough sleep.

It is important to consult with a healthcare professional before starting any exercise program, especially if you have any underlying health conditions.