1. Head, shoulders and chest: hold your head up and hold your chest out. Shoulders open and arms droop naturally. This helps to stretch the upper body and relax the arms.
2. Arms and hands: Your arms should swing back and forth, not left and right, and close to your sides. The hand posture is natural.
3. abdomen: abdomen. This will make you feel taller, steadier and straighter. At the same time, it also helps to relieve the stomach.
Remember that the number of steps per minute should be greater than 120, the time should be greater than 40 minutes, and the exercise should be less than 40 minutes. The energy you consume comes from carbohydrates and sugar stored in your body. It takes more than 40 minutes to gain new energy from the transformation of fat and fatty acids and burn fat at the same time. This is also the characteristic of aerobic exercise. Diet reduces the intake of pasta and animal fat and eats more vegetables. Try to eat chicken and fish for meat. It is advisable to sweat after exercise. Don't forget to do some stretching exercises after walking, such as leg press, stretching and twisting.
If you want to build muscles while losing weight, you should go to the gym at least four times a week, as you said. Remember, equipment exercise is always the best choice for muscle training ~ The coach will give you a series of methods according to your own situation. If combined with creatine, the effect is better. If the conditions do not allow, you can buy a pair of dumbbells, and the effect is good.
I hope my answer can help you!