Final answer:
Starting with 20 minutes of walking each day is the most manageable goal for someone who was completely inactive, helping to ease into a routine and build up to more vigorous exercise over time.
Step-by-step explanation:
If you are just starting a fitness routine and were completely inactive before, walking for 20 minutes a day is the most manageable goal. Avoid an all-or-nothing point of view when it comes to fitness. It's important to start with manageable activities and gradually increase intensity and duration. Moderate exercise, such as walking, can help you build stamina and create a habit of regular physical activity, eventually working towards 30 minutes a day, five days a week. Make sure to reward yourself for your achievements and find activities that you enjoy to maintain motivation.