The great news is that even just a little bit of exercise can completely change your life. Your brain, mental health, physical health, appearance, and much more is improved with even just a half-hour of exercise added to each day. For all of the elements of life that exercise improves, a half-hour saves a lot of time. For example, if you exercise your sleep will be deeper, and instead of needing to set aside an extra hour to get more sleep you could do a half-hour of exercise and get deeper sleep throughout the whole night. Or from adding exercise to your day, your focus and attention will be improved and your productivity greatly improved. This will help keep you from wasting time at work and in school.