Answer:
15-20 days
Step-by-step explanation:
It is recommended that to create the habit of exercising, one should exercise 3-4 times a week, this will be around 15-20 days per month. Creating this habit is very important, because in addition to being a healthy practice, exercise promotes greater resistance, disposition and immunity to the body. For this reason, we can say that if Isaiah wishes to make a habit of exercising, he must exercise regularly for 15 to 20 days.