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.
Gas Exchange During Exercise. During exercise, your body needs more energy, which means your tissues consume more oxygen than they do at rest. Consuming more oxygen means you will also produce more carbon dioxide because your metabolic rate is elevated. The ratio of carbon dioxide produced per oxygen consumed also increases during exercise because a shift from fat to carbohydrate utilization takes place. At the most challenging work rates, you burn carbohydrates exclusively and produce 1.0 liter of carbon dioxide for every liter of oxygen you consume.
Take your pulse to determine your heart rate during a workout. Photo Credit Jupiterimages/Photos.com/Getty Images. Aerobic exercise causes your heart to beat faster and your muscles to exert themselves, promoting calorie burn. While higher-intensity physical activity burns calories faster, it can be difficult to know how hard to push your body. Your heart rate is a useful measurement that helps you determine your aerobic exercise intensity, and maximize fat burn.