Quick Answer. In an officially-sanctioned MLB baseball game, there are 9 innings. If the home team is ahead in the top of the ninth and earns 3 outs, the game ends at 8 1/2 innings. If the game is tied after the away team earns 3 outs in the bottom of the ninth, the game goes into extra innings. Keep Learning.
When you exercise, the muscles you use require more energy. When exercise can be sustained, this demand is met primarily by aerobic means. Aerobic energy production in muscles results in increased gas exchange at the lungs, because more oxygen is taken in and more carbon dioxide is released.
1. Exercise. To ensure your blood is infused with oxygen, you need to work out regularly. When you work out, the cells in the body burn oxygen faster than the regular rate (1). As the carbon dioxide levels in the body increase, your brain increases the respiration rate to get more supply of oxygen. Your lung and heart perform at optimum capacity during the exercise to intake more oxygen.