Вы ошибаетесь  Не так кардио и много нужноThe American College of Sports Medicine has two basic recommendations for cardio exercise. The first suggests 30 minutes of moderate cardio five times per week, and the second recommends 20 minutes of intense cardio three times per week. Each is adequate for general health and weight maintenance.https://www.livestrong.com/article/227267-how-many-days-a-week-should-i-do-cardio-to-lose-weight/