Good for you for taking the first step!
Doctors have been telling patients for years that they need to exercise with an increased heart rate for thirty minutes three times a week to receive cardiovascular (and weight loss) benefits.
A recent study showed that you can walk that you can break up that 30 minutes into smaller increments. As long as those increments total 30 minutes in a day, it's just as good as 30 minutes straight.
So... exercise 3 days a week, but if you can only walk 5 or 10 minutes fast, then walk 10 minutes in the morning, 10 minutes before dinner, and 10 minutes in the evening. See! 3 short 10 minute strolls equals 30 minutes of aerobic workout! How easy does it get?
Create a pattern of exercise that you enjoy. If you enjoy it, you'll keep doing it and lose weight.
Have fun!
Terri