Because it is too thin and has a bad stomach, it can be shaped in a week. You don't need to gain weight deliberately. When you exercise to the point where your body can't bear it, your appetite will automatically increase. At the same time, some functions of your body will slowly recover under the constant exercise of your body, so that you will achieve a good metabolism, automatically gain weight, and you will be rich in strong lean muscles.

The first item is to exercise the ankles, knees, arms and neck. Then start on the treadmill for 2 minutes, walk for 3 minutes, jog 10 minutes, run for 5 minutes, sprint for 5 minutes, and then rest for 1 minute. If you don't buy drinks, drink mineral water to replenish water. You can't sit down or you will become a big ass. Adjust the weight of each instrument to 3-5, and then start to make groups of 8, each instrument has 3 groups, and the next day you will be full 1. One group started jogging after finishing, as long as they kept running on the ordinary treadmill for 5 laps, and then lifted barbells and dumbbells. Don't be too brave, pick one that you can lift above your head. At this pace, you will have very beautiful lines and well-proportioned muscles in a week. The most important thing is that you have perseverance. After you stick to the end of the day I said, you can make it clear whether you want to continue fitness or not.