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Body comp

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Introduction

Body Composition Laboratory report Introduction Body Composition refers to the chemical composition of the body and more specifically fat mass and free fat mass. Body composition is used to describe the percentages of fat, bone and muscle in human bodies. Because muscular tissue takes up less space in our body than fat tissue, our body composition, as well as our weight, determines leanness.Fat-free mass is composed of all of the body's nonfat tissue including bone, muscle, organs, and other types of connective tissue. Body composition is a better indicator of fitness than most other forms of measurement as it takes into account more than just simply body size and weight. Body composition has important obligations in terms of health and physical performance. Excessive body fat leads to obesity and enhances the risk of developing a number of medical, social and psychological disabilities. Performance benefits are also associated with good body composition as excessive body fat is associated with decreased athletic performance in activities where the body mass must be moved through space. (Wilmore, J. H. & Costill, D. L. (2008) (4th edition) Physiology of Sport and Exercise. Champaign, IL: Human Kinetics. PP. 382-397.) A high body fat percentage will negatively impact on an athletes speed, endurance, balance and agility, and jumping ability Body composition can be weighed ...read more.

Middle

Make sure the top of the electrode is toward the shoulder with the tab facing away from the body. Hand: Place on middle finger just above hand knuckle. Tab facing away from the body. Ankle: Place on an imaginary line between the protruding ankle bones straight across to other side of ankle. Make sure that the top of the electrode is toward the thigh with tab facing away from the body. Foot: Place just behind the middle toes above the knuckles (about 1 cm) of the right Foot. When the measurements have stabilized, read and record the displayed Resistance (R), and Reactance (Xc). If the values fluctuate for either of the readings, use the lower value. Skinfold Method procedure The following method is the standardized description of skin fold sites and procedures for the Durnin and Womersley (1974) skin fold method using the Harpenden callipers. Site 1 = Biceps: Vertical fold: on the anterior aspect of the arm over the belly of the biceps muscle, 1cm above the level used to mark the triceps site. Site 2= Triceps: Vertical fold: midway between the acromin and olecranon process; with the arm freely held to the side of the body. ...read more.

Conclusion

The technician's skill and experience is of vast importance to the results within this method, as the participants involved were novices results are impacted to a larger degree in theory. The correct location of the sites on the body also comes under experience and the technician's ability. The equation used to predict the body fat percentage is also an important factor, it has been suggested that some equations consistently show higher or lower results and therefore accuracy is affected. The varying sample size in terms of gender may also have played a part in results as physiological there are gender differences in terms of body fat with females in the main having a higher body fat percentage which is shown in the results and an equal sample size may provide evidence for this point. Having discussed the merits of each method and having looked at the results and significant differences in terms of this experiment I conclude that the Bioelectric Impedance analysis is more accurate measure of body fat percentage within this research. I feel the number number of potential errors within the skin fold method may well have affected the accuracy of results. The validity in terms of would the skin fold produce consistent results if this procedure was repeated would also be in question due to the number of potential mistakes. ...read more.

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