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You searched for subject:(Hydrostatic Weighing). Showing records 1 – 3 of 3 total matches.

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Humboldt State University

1. Reynolds, Kate A. Comparison of body composition measurements across phase of the menstrual cycle: hydrostatic weighing, air-displacement plethysmography vs three compartment model.

Degree: MS, Kinesiology: Exercise Science, 2015, Humboldt State University

Purpose: The purpose of this study was compare %BF values measured by BODPOD, HW to the Siri 3-Compartment Model equation, and to determine if the fluctuations of body weight as a result of fluid retention during the luteal phase of the menstrual cycle will affect the results of body composition measurements. Methods: Twenty subjects, 18-26 yrs old, participated in this study. There were 9 female, no birth control (FNBC), 6 female, birth control (FBC), and 5 Control (male) subjects. Each subject was assessed three times over the course of one month or one menstrual cycle. Four values of %BF were obtained, BODPOD, HW, Siri3CBODPOD, and Siri3CHW. Results: Three by three Repeated Measures ANOVA revealed significance difference (p<0.05) between HW and Siri3CBODPOD for FNBC and FBC (p<0.000) and the Control (p=0.001). There was significance between HW and Siri3CHW for FNBC (p<0.000), FBC (p=0.006), and Control (p=0.001). There was no significance between times of assessment for all groups. Significant changes between TBW and weight were not detected. Conclusion: The "sex bias" still needs further investigation. Further research needs to investigate changes in TBW and weight across the menstrual cycle, and if potential changes influence %BF. Advisors/Committee Members: Braithwaite, Rock.

Subjects/Keywords: Body composition; Air-displacement plethysmography; Menstrual cycle; Hydrostatic weighing; Three-compartment model

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Reynolds, K. A. (2015). Comparison of body composition measurements across phase of the menstrual cycle: hydrostatic weighing, air-displacement plethysmography vs three compartment model. (Masters Thesis). Humboldt State University. Retrieved from http://hdl.handle.net/10211.3/143734

Chicago Manual of Style (16th Edition):

Reynolds, Kate A. “Comparison of body composition measurements across phase of the menstrual cycle: hydrostatic weighing, air-displacement plethysmography vs three compartment model.” 2015. Masters Thesis, Humboldt State University. Accessed November 26, 2020. http://hdl.handle.net/10211.3/143734.

MLA Handbook (7th Edition):

Reynolds, Kate A. “Comparison of body composition measurements across phase of the menstrual cycle: hydrostatic weighing, air-displacement plethysmography vs three compartment model.” 2015. Web. 26 Nov 2020.

Vancouver:

Reynolds KA. Comparison of body composition measurements across phase of the menstrual cycle: hydrostatic weighing, air-displacement plethysmography vs three compartment model. [Internet] [Masters thesis]. Humboldt State University; 2015. [cited 2020 Nov 26]. Available from: http://hdl.handle.net/10211.3/143734.

Council of Science Editors:

Reynolds KA. Comparison of body composition measurements across phase of the menstrual cycle: hydrostatic weighing, air-displacement plethysmography vs three compartment model. [Masters Thesis]. Humboldt State University; 2015. Available from: http://hdl.handle.net/10211.3/143734


Virginia Tech

2. Rockwell, John. The Effect of Creatine Supplementation on Muscle Fuel Stores, Body Composition, and Exercise Performance During Energy Restriction.

Degree: MS, Human Nutrition, Foods, and Exercise, 1998, Virginia Tech

The purpose of this investigation was to determine the effects of a four day creatine load and simultaneous energy restriction on muscle creatine content, exercise performance, and body composition in 24 male recreational resistance trainers, age 18-26. Sixteen subjects were randomly divided into placebo (Pl, n=8) and creatine supplement (CrS, n=8) groups. Control (C, n=8) subjects of the same age were recruited separately g à d-1 to complete the performance and body composition tests while consuming their normal diet. The CrS group was administered 20 g à d-1 of creatine monohydrate (Cr) mixed with 5 g à d-1 of sucrose, while the Pl group was administered 25 of sucrose. Both CrS and Pl consumed a formula diet of 75.3 kJ (18 kcal) à kg-1 à d-1 for 4 d. Testing before and after energy restriction consisted of a repeated sprint cycle performance test (10 sprints of 6s, with 30s rest), hydrostatic weighing, and resting needle muscle biopsy. Testing revealed that subjects in CrS and Pl demonstrated significant decreases in body weight and % body fat (%BF) with no difference between groups. However, Pl demonstrated a significantly greater % loss in FFM (2.4 ± 0.25%) compared to CrS (1.4 ± 0.4%) (p<0.05). The muscle fuel stores of CrS and Pl responded significantly to the diet. Significant increases in muscle total Cr (p<0.01), free Cr (p<0.01), and CrP (p<0.05) of 16.5%, 16.8%, and 16% respectively were demonstrated by CrS over the energy restriction period, while Pl demonstrated significant decreases of 7.2% and 8.2% respectively in muscle total Cr (p<0.01) and free Cr (p<0.05). There were no significant differences between groups for performance during the cycle test, however, there were trends toward group by time interactions for performance enhancement in CrS relative to Pl, as total work (p=0.078) and work capacity (p=0.058) increased 3.8 ± 2.2% in CrS and decreased 0.5 ± 0.4% in Pl. It was concluded that short-term energy restriction resulted in decreased muscle Cr storage, and that Cr supplementation during energy restriction increased muscle Cr and CrP stores. Consumption of Cr allowed CrS to lose a significantly lower % FFM compared to Pl. Cr supplementation resulted in trends toward improved performance in CrS relative to Pl after energy restriction, but did not influence losses in body weight or %BF. Advisors/Committee Members: Rankin, Janet L. Walberg (committeechair), Williams, Jay H. (committee member), Houston, Michael E. (committee member), Cross, Lawrence H. (committee member).

Subjects/Keywords: Sprint Cycling; Muscle Biopsy; Hydrostatic Weighing; Ergogenic Aids

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Rockwell, J. (1998). The Effect of Creatine Supplementation on Muscle Fuel Stores, Body Composition, and Exercise Performance During Energy Restriction. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/45219

Chicago Manual of Style (16th Edition):

Rockwell, John. “The Effect of Creatine Supplementation on Muscle Fuel Stores, Body Composition, and Exercise Performance During Energy Restriction.” 1998. Masters Thesis, Virginia Tech. Accessed November 26, 2020. http://hdl.handle.net/10919/45219.

MLA Handbook (7th Edition):

Rockwell, John. “The Effect of Creatine Supplementation on Muscle Fuel Stores, Body Composition, and Exercise Performance During Energy Restriction.” 1998. Web. 26 Nov 2020.

Vancouver:

Rockwell J. The Effect of Creatine Supplementation on Muscle Fuel Stores, Body Composition, and Exercise Performance During Energy Restriction. [Internet] [Masters thesis]. Virginia Tech; 1998. [cited 2020 Nov 26]. Available from: http://hdl.handle.net/10919/45219.

Council of Science Editors:

Rockwell J. The Effect of Creatine Supplementation on Muscle Fuel Stores, Body Composition, and Exercise Performance During Energy Restriction. [Masters Thesis]. Virginia Tech; 1998. Available from: http://hdl.handle.net/10919/45219

3. Bruno Rafael Martins Campos. Validação da absortometria de raios x de dupla energia para estimativa da gordura corporal relativa de adultos jovens tendo como referência a pesagem hidrostática.

Degree: 2005, Universidade Católica de Brasilia

Este estudo utilizou a pesagem hidrostática (PH) para obter valores de referência da gordura corporal relativa (%G) para a validação cruzada da absortometria de raios-x de dupla energia (AXDE) na estimativa da %G de adultos jovens domiciliados na região do Distrito Federal. Foram coletados dados de %G de 37 voluntários adultos, do sexo masculino, com idades entre 18 e 32 anos. As sugestões de LOHMAN (1992) foram seguidas para a análise de validação cruzada, mediante os cálculos do coeficiente de correlação linear de Pearson (r), teste t pareado ou dependente (t), erro constante (EC), erro total (ET) e erro padrão de estimativa (EPE) e, ainda, foi feita a análise dos escores residuais. O ponto de corte adotado para o EPE foi de 2,0%. A significância foi ajustada inicialmente para α<0,05. Foram calculadas as médias da %G obtida por meio das duas técnicas (%G usando PH e AXDE). Além das diferenças entre as médias e do erro padrão de estimativa, apesar do EC de -1,00 ser considerado um erro baixo, a AXDE mostra uma tendência de superestimar a %GPH. O (EPE) com valor de 1,86% não ultrapassou o valor de corte de 2,0% adotado para a validação; contudo, o valor de ET superou o EPE, o que indica que a AXDE não foi uma boa técnica para estimar a %G quando comparada a PH. Analisados os escores residuais, foram encontrados resultados que inviabilizam a validação da AXDE, pois apenas uma parte da amostra, 45,94%, representa valores dentro do limite de validação; 32,43% é superestimada significativamente e 21,62% é subestimada quando a %GAXDE é comparada à %GPH. A pequena inclinação da linha de tendência demonstra que, apesar das diferenças significativas entre as médias de %GPH e de %GAXDE, a AXDE não demonstra forte tendência em superestimar os valores extremos. Notou-se, ainda, que a linha de tendência ficou em uma zona negativa, confirmando a tendência apontada pelo EC, da AXDE, em termos gerais, a superestimar a %G quando comparada a AXDE, fato que corrobora os resultados mostrados pelos desvios padrão das médias de %GPH e de %GAXDE. A partir dos resultados encontrados no presente estudo, pode-se concluir que a AXDE não possui validade cruzada na estimativa da %G nestes adultos jovens domiciliados na região do Distrito Federal, tendo como referência a PH.

The present research is based in the use of hydrostatic weighing (HW) in order to find measures that can be used as reference of the relative body fat (%BF). These measures are used in the crossed validity of the double energys x-ray absortiometry (DEXA) into the relative body fats valuation in young adults dwellers in the Distrito Federal. The information about the relative bodily fat were colleted from 37 volunteers all of them adult men from 18 to 32 years old. The Lohmans (1992) suggestion were followed in the crossed validitys analysis through the computation of the linear correlation coefficient of Pearson (r), paired T test, constant error (CE), total error (TE) and standard error estimation (SEE). The SEEs cut base was of 2%. The significance was adjusted…

Advisors/Committee Members: Herbert Gustavo Simões, Cândido Simões Pires-Neto, Adriana Giavoni, Maria Fátima Glaner.

Subjects/Keywords: pesagem hidrostática; AXDE; gordura - Estimativas; Pesos e medidas; EDUCACAO FISICA; validação cruzada; técnicas de estimativa; gordura corporal relativa; estimate methods; relative body fat; cross-validation; DEXA; hydrostatic weighing; EDUCACAO FISICA

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Campos, B. R. M. (2005). Validação da absortometria de raios x de dupla energia para estimativa da gordura corporal relativa de adultos jovens tendo como referência a pesagem hidrostática. (Masters Thesis). Universidade Católica de Brasilia. Retrieved from http://www.bdtd.ucb.br/tede/tde_busca/arquivo.php?codArquivo=462

Chicago Manual of Style (16th Edition):

Campos, Bruno Rafael Martins. “Validação da absortometria de raios x de dupla energia para estimativa da gordura corporal relativa de adultos jovens tendo como referência a pesagem hidrostática.” 2005. Masters Thesis, Universidade Católica de Brasilia. Accessed November 26, 2020. http://www.bdtd.ucb.br/tede/tde_busca/arquivo.php?codArquivo=462.

MLA Handbook (7th Edition):

Campos, Bruno Rafael Martins. “Validação da absortometria de raios x de dupla energia para estimativa da gordura corporal relativa de adultos jovens tendo como referência a pesagem hidrostática.” 2005. Web. 26 Nov 2020.

Vancouver:

Campos BRM. Validação da absortometria de raios x de dupla energia para estimativa da gordura corporal relativa de adultos jovens tendo como referência a pesagem hidrostática. [Internet] [Masters thesis]. Universidade Católica de Brasilia; 2005. [cited 2020 Nov 26]. Available from: http://www.bdtd.ucb.br/tede/tde_busca/arquivo.php?codArquivo=462.

Council of Science Editors:

Campos BRM. Validação da absortometria de raios x de dupla energia para estimativa da gordura corporal relativa de adultos jovens tendo como referência a pesagem hidrostática. [Masters Thesis]. Universidade Católica de Brasilia; 2005. Available from: http://www.bdtd.ucb.br/tede/tde_busca/arquivo.php?codArquivo=462

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