Créer une présentation
Télécharger la présentation

Télécharger la présentation
## Learning Module 3: Measuring Metabolic Rate

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -

**Learning Module 3:Measuring Metabolic Rate**Clark J Cotton**Measuring Metabolic Rate**Metabolic Rate: the sum of all energetic processes occuring in the body.**Measuring Metabolic Rate**Metabolic Rate: the sum of all energetic processes occuring in the body. How do you measure metabolic rate?**Measuring Metabolic Rate**Metabolic Rate: the sum of all energetic processes occuring in the body. How do you measure metabolic rate? • Direct Calorimetry**Measuring Metabolic Rate**Metabolic Rate: the sum of all energetic processes occuring in the body. How do you measure metabolic rate? • Direct Calorimetry • Mass Balance**Measuring Metabolic Rate**Metabolic Rate: the sum of all energetic processes occuring in the body. How do you measure metabolic rate? • Direct Calorimetry • Mass Balance • Oxygen Consumption**What’s Oxygen Got to do with It?**• Oxygen is the basic reducing compound used to convert sugar to carbon dioxide, releasing energy for our bodies and producing carbon dioxide. • Depending on level of activity, almost all of our metabolism is dependent on oxygen. 6 O2 + C6H12O6 6 CO2 + 6 H2O**Measuring Metabolic Rate**• Materials: 1 empty milk jug, plastic tubing, 500ml beaker, permanent markers. • Gradually fill up milk jug in 500ml increments, mark each addition. • Flip jug upside down in tub of water and insert plastic tube. • If you breath in through your nose, and out through your mouth you can calculate the amount of air you breath.**Tidal Volumes**• Tidal volume is the volume of air you inhale and then exhale with each breath.**Vital Capacity**• Vital Capacity is the maximum amount of air that you can inhale and exhale.**Dead Space**• Dead space volume is the volume of air that does not participate in gas exchange because of airway volume. Dead space volume (ml) = body weight (kg) * 2.2**Total Lung Capacity**• Total lung capacity is equal to the vital capacity + the dead space.**If you know the number of breaths you take per minute, and**the average volume of air per breath, you can calculate the total volume of air you’re breathing per hour. Assuming that the air you breath contains 21% oxygen, and the air you exhale contains 17% oxygen, you can calculate your total oxygen consumption per hour. Example: 15 breaths / minute 500ml air / breath 450 L air / hour (.21*450) – (.17*450) = 18 L O2 per hour Measuring Metabolic Rate**Possibilities with Metabolic Rate Measurements**Effects of: • Age • Exercise • Size • Temperature • Time of Day**Possibilities with Metabolic Rate Measurements**Effects of: • Age • Exercise • Size • Temperature • Time of Day**Possibilities with Metabolic Rate Measurements**Effects of: • Age • Exercise • Size • Temperature • Time of Day**Possibilities with Metabolic Rate Measurements**Effects of: • Age • Exercise • Size • Temperature • Time of Day**Possibilities with Metabolic Rate Measurements**Effects of: • Age • Exercise • Size • Temperature • Time of Day