First of all, you should understand that the purpose of fitness is not to end with big muscles. Fitness is simply to make your body healthy and happy. Specifically, when smoking, nicotine can stimulate the nerves to bring a certain sense of pleasure, and then, then your lungs are damaged, which will have a negative impact on oxygen circulation. When lifting iron, you will be more tired if the oxygen circulation can't keep up with you. There is a reason why others are faster and stronger. After drinking, it will reduce the motor nerve sensitivity after nerve stimulation. When you are in weight-bearing training, your nerves are numb, your attention is not enough, and tragedy is just around the corner. In fact, you must know this yourself, but how to choose is your own business. You can certainly get a more rigorous and detailed answer yourself. Be kind to your health, my friend. When you feel smoking in the gym, you will feel that it is a hundred times more wonderful than the pleasure of smoking and drinking, so pure, perfect and harmless.