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Author: J. A. Hodgdon
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
In October of 1981, OPNAVINST 6110.1B was promulgated establishing the percentage of body weight contributed by fat mass (%BF) as the basis for weight control decisions. Tables based upon the work of Wright, Dotson, and Davis allowing prediction of %BF from abdominal and neck circumferences were accepted for use on an interim basis. This report covers validation of the equation of Wright and his co-workers, as well as the development and cross- validation of a new equation which offers improved prediction of %BF for U.S. Navy male personnel. Anthropometric measures consisting of 8 skinfold thicknesses, 12 body circumferences, height, and body weight were made on 602 male U.S. Navy personnel aged 18-56 years (mean age = 32 yrs). In addition, each participant had her body density and %BF determined by underwater weighing. Validity of the equation of Wright and co-workers was assessed by correlation between predicted and measured %BF. The correlation coefficient = 0.87 (std. err. meas. = 3.99 %BF). Errors in prediction near the Navy minimum standard of 22% BF, dictated development of a new equation.
Author: J. A. Hodgdon
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
In October of 1981, OPNAVINST 6110.1B was promulgated establishing the percentage of body weight contributed by fat mass (%BF) as the basis for weight control decisions. Tables based upon the work of Wright, Dotson, and Davis allowing prediction of %BF from abdominal and neck circumferences were accepted for use on an interim basis. This report covers validation of the equation of Wright and his co-workers, as well as the development and cross- validation of a new equation which offers improved prediction of %BF for U.S. Navy male personnel. Anthropometric measures consisting of 8 skinfold thicknesses, 12 body circumferences, height, and body weight were made on 602 male U.S. Navy personnel aged 18-56 years (mean age = 32 yrs). In addition, each participant had her body density and %BF determined by underwater weighing. Validity of the equation of Wright and co-workers was assessed by correlation between predicted and measured %BF. The correlation coefficient = 0.87 (std. err. meas. = 3.99 %BF). Errors in prediction near the Navy minimum standard of 22% BF, dictated development of a new equation.
Author: James A. Hodgdon
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
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Book Description
In October 1981, OPNAVINST 6110.1B was promulgated establishing the percentage of body weight contributed by fat mass (%BF) as the basis for weight control decisions. Tables based upon the work of Wright, et al. allowing prediction of %BF from neck, biceps, forearm, abdomen and thigh circumferences were accepted for use on an interim basis. This report covers validation of the equation of Wright and his co-workers, as well as development and cross- validation of a new equation which offers improved prediction of %BF for U.S. Navy female personnel. Anthropometric measures consisting of 8 skinfold thicknesses, 11 body circumferences, height, and body weight were made of 214 female U.S. Navy personnel aged 18-44 years (mean age - 26.5 years). In addition, each participant had her body density and %BF determined by underwater weighing. Validity of the Wright equation was assessed by correlation between predicted and measured %BF. The correlation coefficient - 0.80 (std. err. meas. = 4.19 %BF). Errors in prediction near the Navy minimum standard of 30% BF, dictated development of a new equation. Factor analysis of the anthropometric variables indicated a suitable equation could be developed using circumferences and height as predictors. An equation was developed using forward, stepwise multiple regression of logarithmic transforms of circumferences and height as predictors of body density determined from underwater weighing. The final equation was: Body Density = -0.350 x log (ABDOMEN I + HIP - NECK) + 0.221 X log (HEIGHT) + 1.296. All measurements are expressed in centimeters. The multiple correlation coefficient for this equation was 0.85.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
All U.S. Navy service members are required to meet percent body fat (%BF) standards as a condition of military service. Naval personnel who exceed standards for %BF can be separated from active duty. Currently, %BF predictions are determined by circumference measurements and a prediction equation (circumference equation = CEQ). In view of the importance these prediction results have for personnel retention, a validation study was undertaken to determine the accuracy of %BF prediction for a population determined to be overfat by the CEQ. The population for the validation study comprised men with 22%BF or greater and women with 30%BF or greater. Values for %BF were determined for 49 men and 50 women by hydrostatic weighing (HW) and circumference measurements at the Naval Submarine Medical Research Laboratory (NSMRL) using a regression equation developed at the Naval Health Research Center (NHRC), San Diego, California. The HW and CEQ values were compared to a superset of the original NHRC population. The correlation coefficients for the NSMRL validation group were lower than those reported in the original NHRC group. The results are attributed to the restricted range of NSMRL data and greater error of prediction at extreme ranges of values. A medical diagnostic model was used to evaluate the sensitivity, specificity, and predictive value of CEQ. It shows that the Navy's current procedures produce a 6.8 to 18% false positive rate for individual declared as having excess body fat. The data suggest that caution should be utilized when using the CEQ method for individual career decisions. Body fat, Prediction, Hydrostatic weighing, Circumference.
Author: Keith A. Peterson
Publisher:
ISBN:
Category :
Languages : en
Pages : 17
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Book Description
This study compared several weight-height indices with an estimate of percent body fat based on a few circumference measurements. The utility of alternative obesity/overfatness measures was assessed by comparing the strength of their associations with several measures of physical fitness, including a 1.5-mile run/walk, 2-minute sit-ups test, sit-reach flexibility test, and an average fitness score. Study participants included 5710 Navy men and 477 Navy women, For men, percent body fat estimated from circumference measures predicted all the components of physical fitness significantly better than any of the weight-height indices. For women, estimated percent body fat was a significantly better predictor of two of the four fitness measures. Overall, the pattern of associations between physical fitness and both the estimated percent body fat and the weight-height measures was similar for men and women; however, the correlations between the percent fat and the fitness measures were stronger for men than for women. These findings suggest that the Navy's procedure for estimating fatness using circumference measures provides a better screen for physical fitness testing than would any of the commonly used weight-height indices.
Author: Institute of Medicine
Publisher: National Academies Press
ISBN: 030904586X
Category : Technology & Engineering
Languages : en
Pages : 371
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Book Description
This book surveys the entire field of body composition as it relates to performance. It includes a clear definition of terminology and a discussion of the various methods for measuring body composition. The authored papers represent a state-of-the-art review of this controversial field and address questions such as: What is a better measure of body compositionâ€"body fat or lean body mass? Does being overweight for one's height really affect performance? The book also addresses the issue of physical appearance as it relates to body fatness and performance. It includes an in-depth discussion of many of the topics of interest to those involved in sports medicine and exercise physiology.
Author: K. Kujawa
Publisher:
ISBN:
Category :
Languages : en
Pages : 19
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Book Description
The U.S. Navy employs equations that use height and body circumferences to estimate percent body fat. However, many sailors question the accuracy of the Navy's body fat estimation equations. The Health and Physical Fitness Branch (Pers 601) of the Naval Bureau of Personnel frequently receives requests to substitute a percent body fat obtained with skinfold- or bioimpedance-based body fat estimation equations (Pers 601, personal communication). There may be a perception that skinfold- or bioimpedance-based equations are more accurate than circumference-based equations since the former equations are more commonly used in settings such as health clubs.
Author: K. Kujawa
Publisher:
ISBN:
Category : Adipose tissues
Languages : en
Pages : 0
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Book Description
The U.S. Navy employs equations that use height and body circumferences to estimate percent body fat. However, many sailors question the accuracy of the Navy's body fat estimation equations. The Health and Physical Fitness Branch (Pers 601) of the Naval Bureau of Personnel frequently receives requests to substitute a percent body fat obtained with skinfold- or bioimpedance-based body fat estimation equations (Pers 601, personal communication). There may be a perception that skinfold- or bioimpedance-based equations are more accurate than circumference-based equations since the former equations are more commonly used in settings such as health clubs.
Author: James A. Vogel
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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Book Description
Author: American College of Sports Medicine
Publisher: Human Kinetics Publishers
ISBN: 1492526398
Category : Medical
Languages : en
Pages : 202
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Book Description
ACSM's Body Composition Assessment provides practicing fitness, health, and medical professionals with information about various body composition measurement methods in clinical and field settings--evidence-based protocols, advantages, sources of measurement error, and more.
Author: Henry C. Lukaski
Publisher: CRC Press
ISBN: 1351646958
Category : Health & Fitness
Languages : en
Pages : 720
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Book Description
Interest in the relationships between body structure and function in physical activity has persisted for centuries. Body Composition: Health and Performance in Exercise and Sport advances understanding beyond simple descriptions of body physique and composition of athletes and fills gaps in our understanding of the important role of muscle, fat, and bone in facilitating physical performance and health in sports and physically demanding occupations. lt addresses basic, practical, and applied topics in body composition, performance, and health with comprehensive reviews organized in four logical parts: Body Composition Assessment; Physical Activity and Body Composition; Body Composition in Sports and Occupations; and Moderating Factors. This book integrates state-of-the-art knowledge by international experts in the field and produces an evidence-based practical guide for a balanced understanding of the role and use of body composition assessment in physical performance and health for youth and adults. It also provides a needed link between the practice of body composition assessment and its application by members of public health advisory committees that develop national guidelines for diet, physical activity, and health. This book is suitable for students and professionals in sports nutrition, exercise science, kinesiology, and athletic training. Sport administrators and policy-makers for international and national sport federations and organizations, and national intercollegiate and scholastic federations, would also benefit from this book.
