If you're walking to lose weight, a recent study says you need to walk at a quick pace of at least 100 steps per minute in order for it to be considered moderate intensity. A pedometer is a great tool to use when you're strolling along, since it tells you how many steps you've taken. You can also check it to make sure you're taking enough steps within a certain number of time in order to get your heart rate up. So in a 30-minute workout, you should take at least 3,000 steps. If this rate is too fast at first, start off doing 1,000 steps in 10 minutes before you build up to 30 minutes.