You will burn calories, and if you are overweight, you will lose it (a little)
If you have a sedentary lifestyle, you will tone your body (small)
Movement is life)
Depends on the pace of walking. But you will burn about 1000 kcal for sure and tone your leg muscles. It is better to start with 5000-7000 and progress, so as not to kill your knees out of habit. Then you can start running.
You will have normal blood vessels in your legs, there will be normal blood flow in the veins due to the tone of the walls of the blood vessel. The heart will be ready for stress.
definitely my body will benefit greatly from 20,000 steps and will be glad and grateful to its owner for taking care of it. he will feel more vigorous, healthier, more energetic, prettier and younger.
I am already over seventy. I walk ten kilometers every day, sometimes more. It all started a long time ago. I was engaged in water tourism and sometimes had to go very far to get to the place of rafting. Now, after being kicked out on a pension, I walk in the morning in any weather. I do not feel bad.
Five days a week for 9 hours, I do about 20,000 steps a day. I didn't notice any positive changes in myself. But, I have heaviness in my legs, pain in my knees and feet, I suffer from leg cramps at night.
In Japan, thirty years ago, there was a theory put forward that ten thousand steps should be taken a day to prevent heart disease. And this proved the effectiveness of this method. Personally, I still try to implement this recommendation and it benefits me. Every person has the right to do what he considers useful for himself, but it is necessary to adhere to the method "do not harm yourself" !!! Best regards.