Consistency is key to the success of any new training program. Working out for four thirty-minute sessions is better for your body than doing two one-hour sessions. You want to push your body on a consistent basis to encourage muscle growth and develop endurance. If you try to fit all of your training in just one or two days per week, you will not have the necessary stamina to see a lot of improvement. In addition to seeing fewer results, you will also risk injuries if you only train once or twice a week. Carefully plan out a schedule that allows you to get a moderate amount of exercise several days per week.