Lab 1 Background and Methods Module Body Composition

Lab 1 Background and Methods Module Body Composition -...

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NUTRITION 121 HUMAN NUTRITION LABORATORY BACKGROUND AND METHODS MODULE #1 BODY COMPOSITION REPORT DUE DATE: GROUP A: February 15 th (Mon), 2010 at 11:55pm GROUP B: February 22 nd (Mon), 2010 at 11:55pm Late Labs -10pts! After 1 week late, student will receive 0pts for the lab!! Written and edited by: Karon Felten M.S., R.D. With Special Thanks to: Chris Pritsos Ph.D. Nutrition Department Chairman 1
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ABSTRACT: In nutrition, there are many factors that influence an individual’s health and body weight, such as heredity, food selection, eating behaviors, and physical activity. Scale weight is not always a good indicator of body fat, lean mass, body water or overall health (1). This laboratory experience will give students the opportunity to conduct physical assessments by evaluating body weight and body composition. To determine body weight and body composition, techniques such as bioelectrical impedance analysis (BIA), body mass index (BMI), waist circumference, wrist circumference for determining frame size, and a scale will be utilized. Students will also evaluate their own risk for cardiovascular disease and assess cardiovascular health in volunteers by measuring heart rate, filling out a heart disease risk score form, and estimating oxygen consumption and energy expenditure through a technique known as the Queens College Three-Minute Step Test. BACKGROUND: Your body is made up of the six essential nutrients: water, fat, protein, carbohydrates and various vitamins and minerals. Many factors can influence an individual’s health and body weight: heredity, eating behaviors, food selection, and amount of daily exercise. As mentioned previously, weight is not a good indicator of bodily health and balance. For any individual of a given height, there is no single best weight, but a range of healthy weights best determined by one’s body composition. For directly assessing an individual’s body composition, it is common for bioelectric impedance analysis (BIA) to be performed. Additionally, wrist circumference to determine frame size and calculating one’s body mass index (BMI) are two commonly used methods for indirectly assessing body composition. Combinations of these direct and indirect techniques can lead to an overall understanding of body composition allowing for prescriptions of exercise and nutrition to be levied for any desired positive and healthy changes. It is typically most useful to consider the body’s composition in its simplest terms of fat mass, lean mass, and water mass. This concept can be taken down further by estimating percentages of 2
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fat, body cell mass (BCM), and extracellular mass (ECM), total body water (TBW), intracellular water (ICW), and extracellular water (ECW) (1). These are much better indicators of health than just an individual’s weight. Fat can be defined as the energy storage of the body with a total density of 0.9g/ml and can be equal to a person’s actual weight minus the fat free mass (FFM) of that individual (1). Body cell mass (BCM) is the portion of the body where the work is done,
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This note was uploaded on 02/23/2012 for the course SOC 101 taught by Professor Prof. during the Spring '11 term at University of Nevada, Las Vegas.

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Lab 1 Background and Methods Module Body Composition -...

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