If you are tired, it's actually because you haven't exercised for a long time, so if you haven't exercised for a long time, you don't have to formally enter the plan in the first week. You can do 1 group for each movement, and enter your own training plan after 1-2 weeks of adaptation.
By the way, fitness is very important. It's no use fishing for three days and casting a net for two days. If you practice for three months according to your own plan, it will definitely have an effect.
Secondly, fitness is actually three points of practice, three points of rest and four points of eating.
Practice hard and stick to it. Of course, rest is also essential. If you stay up late and sleep less than 8 hours a day, you will never be strong, because only by sleeping can your muscles be fully repaired. Of course, eating is also important. You won't get fat if you practice without eating. Generally speaking, you'd better add at least 1 meal a day. After 30-90 minutes of exercise, 3-4 eggs will turn white, the yolk will be lost, and the yolk has cholesterol. Eating an egg yolk every day is enough.
The rest of the meal process increased the intake of protein and vitamins.
If you can do these three things well, come to me if you don't gain weight.