Tim Allen. This is the latest accepted revision, reviewed on 7 April 2017. For those of the same or a similar name, see Timothy Allen (disambiguation). Timothy Allen Dick (born June 13, 1953), known professionally as Tim Allen, is an American actor, comedian and author.
Not necessarily. Some of the symptoms of low oxygen can be shortness of breath, fast heart rate, changes in the color of the lips and fingernails, but some people will have a low oxygen level without experiencing any of these symptoms. Others may experience these symptoms without having a low oxygen level.
During exercise, your body consumes large amounts of oxygen. In fact, this is part of what helps you to lose weight. The more oxygen your body consumes, the harder that you're working out. It's one reason that you typically lose a lot of weight when you first start working out. Because your body is not accustomed to working out as much, you use a lot of oxygen during the course of your initial workouts. This oxygen is required to feed your muscles and keep them working. As you get into shape and get used to working out, though, your body doesn't require quite as much oxygen as before. Therefore, you have to find new ways to make your workouts more difficult, in order to increase the oxygen consumption rate if you're looking to lose weight.