MCB 32L Lab Report #7 - Jae Shin (Clarice Kim, Janice Chow,...

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Jae Shin (Clarice Kim, Janice Chow, R Leger) 11/02/10 Wendy Ingram Lab Report #7 Lab 7: Exercise Physiology I. Introduction Background: In this lab experiment, we will measure the body’s response to endurance exercise, specifically running and biking, by performing a series of measurements under resting conditions, at a low intensity, and at a moderate intensity. This experiment in incorporate a new parameter of measurement – the body’s rate of oxygen consumption (VO2). It is important to understand that at resting conditions, the body and the muscles will consume very low amount of oxygen, and other energy requirements to maintain the body’s condition will be different than the energy requirements during maximal exercise. Even at rest, cells require energy to maintain the bodily functions. This energy comes from the foods that we eat – carbohydrates, fats, and proteins. Metabolism or metabolic rate, describes all the chemical changes that occur within our body; basal metabolic rate (BMR), thermal effect of activity, and energy from digestion of food. BMR is the minimum amount of metabolism required to perform the basic functions of our body such as blood circulation, respiration, and maintenance of body temperature. During exercise, the body requires more energy and oxygen and this demand is met mostly through the process called oxidative phosphorylation. Because this process requires a series of steps to occur, an increase in oxygen consumption during endurance exercise is accompanied by changes in many physiological variables. Hypothesis: My hypothesis for this experiment is that the oxygen consumption (VO2), % of energy oxidized, and the heart rate and blood pressure will increase from rest to exercise; the amount of increase will vary depending on the intensity of the exercise and the fitness level of the subject. Resting heart rate will be lower for those whose cardiovascular fitness level is high due to the strength of the heart muscle and its contraction. II. Materials and Methods
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In this lab, each member of the group will have a designated role; test subject, data measurer, data recorder, and LabScribe user. The three main exercise stations are Resting Metabolic Rate station, Bicycle Ergometer, and the Treadmill. The
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MCB 32L Lab Report #7 - Jae Shin (Clarice Kim, Janice Chow,...

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