Fitness or shaping, it has two functions: 1) burning calories, people are thin and have lines; 2) Convert fat energy into muscle.

The basal metabolic rate of fat people is higher than that of thin people, so a little exercise is more effective for them. Of course, this effect is generally only reflected in the obvious weight loss, and the body shape change will not be too obvious in a short time.

For thin people, the basal metabolic rate is low and the body fat content is low, so your fitness effect will be slower than that of fat people. I hope you don't get discouraged. Fitness shaping depends on persistence. You can feel whether your meat is a little tight after a week. If it is, it means that your exercise has been effective. You just need to exercise for a few more weeks, and you should be able to see the changes in muscle lines.

Attachment: 1 month is the key period for fitness to produce results. I hope the landlord will not give up easily during this period.