I was skeptical of the idea of working out every day, but after I read this, I thought it was a good and achievable goal for a week: Midday Workout Habit — I Tried It: Working Out in the Middle of the Day. The key is to be open to change and not go hard every day. But if you can go harder, try it.
If you are thinking, “exercise? I can barely walk”, then choose walking to be your new fitness routine. If you need advice on that, read this: How to Keep a Fitness Streak — Turn Daily Walks into a Habit.
If you were walking before as exercise and you found it boring (confession, I did), here’s some advice on how to make it more interesting: The Joy of Steps: 20 Ways to Give Purpose to Your Daily Walk
If walking still isn’t your thing, then here’s a guide to finding something good to do: Keeping Fit: How to Do the Right Exercise for Your Age
Remember, you don’t normally have to exercise a lot. Indeed, this article encourages you to take a bit more than 10 minutes to get some benefits: Exercise 11 Minutes a Day for a Longer Life.
While 11 minutes is good to extend your life, if you want to lose weight, then read this: Exercise for Weight Loss: Aim for 300 Minutes a Week
Finally, whatever you do, remember this: Exercise Shouldn’t Feel Horrible