Every workout routine on the market isn't right for every person. When you begin a workout after a long hiatus or if you've never exercised in your life, you shouldn't go all out on your first day of training.
The best approach is to participate in a low intensity workout for at least 40 minutes. This is to ensure that you don't overwork your muscles and become a victim of mental burnout.
Low intensity doesn't mean that you should coast through your workouts. Your heart rate should reach 40% - 60% of the maximum rate. If your heart rate is lower than 40%, you are not getting the most out of your workout. If your heart rate is more than 60% you are doing too much too soon, and your body will feel it.
That's one of the reasons people quit working out early on in their training. They are so gung-ho about the process that they put in more effort than their body is ready for. In turn, the body reacts negatively and before you know it, their back to the couch with a salty bag of chips. Don't let this happen to you.
There are several low intensity workout routines you can participate in, including walking, cycling or jogging. These old standbys never go out of style, probably because the exercises are easy to do. To get the most out of your routines, make sure to walk, cycle, or run at least four days a week.
Also make sure to vary your routines. If you're on equipment, increase the intensity from time to time. Or if you exercise outdoors, search for a place that is hilly. Monitor your heart rate to ensure you are within your zone.