How old is it? Is it a man or a woman? What is the body fat rate? How long was the last training cycle?

In a word, if you are overweight and have poor cardiopulmonary function, you should lose fat first, otherwise it will be too difficult or even too dangerous for you to do resistance training. .

If you have a good exercise foundation, you don't need to lose fat. After 1~2 cycles of muscle building training, you should consume almost all the fat. Because muscle training still needs to include some aerobic exercise.