Instead, start doing things that will produce endorphins, make a list of all things that will make you produce dopamine and endorphins, and remind yourself that every time you face a choice, you should give priority to things that can bring pleasure. It's not something that can only bring you pleasure. For example, one thing that can bring you a sense of accomplishment is to increase your income.
Second, take action. If you don't act, and all theories are just on paper, then act now and start making plans and goals for next week, and arrange at least three days of exercise time. Since exercise is the easiest thing to produce anti-endorphins, as long as you exercise for three days a week, you can ensure that you have the energy to complete the goals you set for the week. No matter what your goal is, you will feel unprecedented satisfaction and pleasure this weekend. This is endorphin.
Third, use higher desires to overcome lower desires. People who are not self-disciplined are actually ignorant of greater desires. You said that if you don't have self-discipline, you can't stick to fitness and study, but now if someone gives you 1 10,000 yuan to keep fitness for one year, you can instantly gain the ability of self-discipline, because the essence of cleverness is to pursue higher desires. If a person does not pursue the immediate desires, then his heart will inevitably have greater desires. Drop into the sea, people are not sages, and it is indisputable that it should be greatly increased.