How Many Days a Week Should You Work Out? Here’s What Trainers Say Health.com 12/22/2020 what to do and also when to do it—and the latter often means answering the common question: How many days a week should I work out? Of course, the answer can vary from person to person, and takes into account fitness goals, activity level, age, and more. But you can follow some general guidelines to help you plan an optimal weekly workout schedule—one that keeps you consistent with your fitness. Here’s how. How often should I work out—and what do I do?