When beginning an exercise program, one mistake many people make is over doing it. You don’t want to do too much too fast. This can put extra stress on the muscular, skeletal, and cardiorespiratory systems. Soreness from an overly vigorous workout may actually deter you from exercising for a few days after.
Although you may be motivated to go full speed, it is important to start gradually and build up to higher intensity and longer periods of exercise over time.
If you have been previously inactive, you may want to start with just 15-30 minutes of light to moderate activity daily activity. Slowly increase your time and intensity until you can perform 30-60 minutes of moderate to vigorous exercise.