Assessment of energy expenditure in children using the RT3 accelerometer

Kavouras, Stavros A.; Sarras, Stavros E.; Tsekouras, Yiannis E.; Sidossis, Labros S.

doi:10.1080/02640410801910251

Cited by 21 publications

(19 citation statements)

References 24 publications

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“…At a constant speed, an increased energy cost means that the rate of O 2 consumption increases and level of physical effort elevates. For example, there is a progressive rise in the rate of energy expenditure and a doubling of energy cost between normal walking (4 km h ) [15]. The problem occurs when the rate of O 2 consumption _ VO 2 À Á approaches its maximum _ VO 2 max À Á ; at this moment, the consumption of oxygen is levelling off as anaerobic oxidation processes occur.…”

Section: Introductionmentioning

confidence: 99%

Gait in adolescent idiopathic scoliosis: energy cost analysis

et al. 2009

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Walking is a very common activity for the human body. It is so common that the musculoskeletal and cardiovascular systems are optimized to have the minimum energetic cost at 4 km/h (spontaneous speed). A previous study showed that lumbar and thoracolumbar adolescent idiopathic scoliosis (AIS) patients exhibit a reduction of shoulder, pelvic, and hip frontal mobility during gait. A longer contraction duration of the spinal and pelvic muscles was also noted. The energetic cost (C) of walking is normally linked to the actual mechanical work muscles have to perform. This total mechanical work (W tot ) can be divided in two parts: the work needed to move the shoulders and lower limbs relative to the center of mass of the body (COM b ) is known as the internal work (W int ), whereas additional work, known as external work (W ext ), is needed to accelerate and lift up the COM b relative to the ground. Normally, the COM b goes up and down by 3 cm with every step. Pathological walking usually leads to an increase in W tot (often because of increased vertical displacement of the COM b ), and consequently, it increases the energetic cost. The goal of this study is to investigate the effects of scoliosis and scoliosis severity on the mechanical work and energetic cost of walking. Fiftyfour female subjects aged 12 to 17 were used in this study. Thirteen healthy girls were in the control group, 12 were in scoliosis group 1 (Cobb angle [Cb] B 20°), 13 were in scoliosis group 2 (20°\ Cb \ 40°), and 16 were in scoliosis group 3 (Cb C 40°). They were assessed by physical examination and gait analysis. The 41 scoliotic patients had an untreated progressive left thoracolumbar or lumbar AIS. During gait analysis, the subject was asked to walk on a treadmill at 4 km h -1 . Movements of the limbs were followed by six infrared cameras, which tracked markers fixed on the body. W int was calculated from the kinematics. The movements of the COM b were derived from the ground reaction forces, and W ext was calculated from the force signal. W tot was equal to W int ? W ext . Oxygen consumption _ VO 2 À Á was measured with a mask to calculate energetic cost (C) and muscular efficiency (W tot /C). Statistical comparisons between the groups were performed using an analysis of variance (ANOVA). The external work (W ext ) and internal work (W int ) were both reduced from 7 to 22% as a function of the severity of the scoliosis curve. Overall, the total muscular mechanical work (W tot ) was reduced from 7% to 13% in the scoliosis patients. Within scoliosis groups, the W ext for the group 1 (Cb C 20°) and 2 (20 B Cb B 40°) was significantly different from group 3 (Cb C 40°). No significant differences were observed between scoliosis groups for the W int . The W tot did not showed any significant difference between scoliosis groups except between group 1 and 3. The energy cost and _ VO 2 were increased by around 30%. As a result Muscle efficiency was significantly decreased by 23% to 32%, but no significant differences related to the severi...

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Section: Introductionmentioning

confidence: 99%

Gait in adolescent idiopathic scoliosis: energy cost analysis

et al. 2009

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“…Although the RT3 also overestimated EE at these speeds in the current study, a smaller mean bias was found: +2% and +21%, respectively. Kavouras et al (Kavouras, Sarras, Tsekouras, & Sidossis, 2008) and Hussey et al (Hussey et al, 2009), however, reported that the RT3 underestimated EE at 6 km.h -1 . As LOA were not reported by any of these studies it is difficult to comment on their findings in relation to the data recorded during this study.…”

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confidence: 99%

“…Not only may equations developed on adults not be applicable to children, changes in children's walking patterns with age (Bjornson et al, 2011) may reduce the accuracy of the monitors across age. The RT3, IDEEA and SWA have been validated in children aged 7-14 yr, 8-17 yr, and 8-15 yr, respectively (Arvidsson et al, 2011;Arvidsson et al, 2007;Arvidsson, Slinde, Larsson, et al, 2009;Calabro, Welk, & Eisenmann, 2009;Dorminy, Choi, Akohoue, Chen, & Buchowski, 2008;Hussey et al, 2009;Kavouras et al, 2008;Sun et al, 2008;Zhang, PiSunyer, & Boozer, 2004). This study provides a unique evaluation of these monitors in children aged 6-17 years.…”

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confidence: 99%

An evaluation of energy expenditure estimation by three activity monitors

Ryan

Gormley

2013

European Journal of Sport Science

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A comparative evaluation of the ability of activity monitors to predict energy expenditure (EE) is necessary to aid the investigation of the effect of EE on health.Purpose: To validate and compare the RT3, the SWA and the IDEEA at measuring EE in adults and children. Methods: Twenty-six adults and 22 children completed a resting metabolic rate test and performed four treadmill activities (3 km.h -1 , 6 km.h -1 , 6 km.h -1 at a 10% incline, 9 km.h -1 ). Energy expenditure was assessed throughout the activities by the RT3, the SWA and the IDEEA. Indirect calorimetry was used as a criterion measure of EE against which each monitor was compared. Mean bias was assessed for by subtracting EE from IC from EE from each monitor for each activity. Limit of agreement plots were used to assess the agreement between each monitor and IC. Results: Limits of agreement for resting EE were narrowest for the RT3 for adults and children. Although the IDEEA displayed the smallest mean bias between measures at 3 km.h -1 , 6 km.h -1 , and 9 km.h -1 in adults and children the SWA agreed closest with IC at 6 km.h -1 , 6 km.h -1 at a 10% incline and 9 km.h -1 .Limits of agreement were closest for the SWA at 9 km.h -1 in adults representing 42% of the overall mean EE. Conclusions: Although the RT3 provided the best estimate of resting EE in adults and children, the SWA provided the most accurate estimate of EE across a range of physical activity intensities.

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“…Foi utilizado acelerômetro tri-axial TriTrac, modelo RT3 (Stayhealthy Inc., Monrovia, CA) que, em ambiente laboratorial e frente atividades do cotidiano, mostrou ter validade suficiente para dimensionar volume e intensidade da atividade física de crianças e adolescentes 29,30 . Mediante recurso computacional e utilizando software específico do fabricante, características dos participantes (sexo, idade, peso corporal e estatura) foram transferidas para a memoria do RT3.…”

Section: Procedimentosunclassified

Medida Da Atividade Física Em Jovens Brasileiros: Reprodutibilidade E Validade Do Paq-C E Do Paq-A

Guedes

2015

Rev Bras Med Esporte

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RESUMOIntrodução: O Physical Activity Questionnaire for Children (PAQ-C) e o Physical Activity Questionnaire for Adolescents (PAQ-A) foram originalmente propostos para oferecer medidas autorrelatadas da prática de atividade física de jovens. Objetivos: Traduzir para o idioma português, realizar adaptação transcultural e analisar reprodutibilidade e validade concorrente do PAQ-C e do PAQ-A em amostra de jovens brasileiros. Métodos: Versões originais foram traduzidas de acordo com recomendações internacionais. Os questionários traduzidos foram administrados em amostra de 528 jovens (285 moças e 243 rapazes) com idades entre oito e 18 anos. Reprodutibilidade foi obtida por intermédio de réplicas de aplicação dos questioná-rios, com intervalo de uma semana, envolvendo coeficiente de correlação intraclasse (CCI) e técnica de Bland-Altman. A consistência interna foi analisada mediante coeficiente alfa de Cronbach. Para análise da validade concorrente foram consideradas informações apresentadas pelo acelerômetro RT3 durante sete dias como critério de referência. Atividade física total (AFtotal) e atividade física de intensidades moderada a vigorosa (AFMV) derivadas do acelerômetro foram comparadas mediante coeficiente de correlação de Spearman com pontuações apresentadas pelos questionários. Resultados: Após discretas modificações apontadas no processo de tradução, um comitê de juízes considerou que as versões traduzidas do PAQ-C e do PAQ-A apresentaram equivalências semântica, idiomática, cultural e conceitual. Reprodutibilidade teste-reteste mostrou CCI entre 0,68 e 0,88. A técnica de Bland-Altman evidenciou elevada capacidade de concordância entre réplicas de aplicação dos questionários. A consistência interna mostrou α = 0,71 e α = 0,76, respectivamente. A pontuação dos questionários demostrou correlações moderadas com AFtotal (rho = 0,40; rho = 0,50) e AFMV (rho = 0,48; rho = 0,54) estimadas pelo acelerômetro. Conclusão: A tradução, adaptação transcultural, reprodutibilidade e validade concorrente do PAQ-C e do PAQ-A foram satisfatórias, o que viabiliza sua aplicação em futuros estudos no Brasil.Palavras-chave: questionários, tradução, adaptação, psicometria, Brasil. (rho = 0.40; rho = 0.50) and MVPA (rho = 0.48; rho = 0.54) ABSTRACT Introduction: The Physical Activity Questionnaire for Children (PAQ-C) and the Physical Activity Questionnaire for Adolescents (PAQ-A) were originally developed to provide self-reported measurements associated with the practice of physical activity by youth. Objectives: To translate into the Portuguese language, make a cross-cultural adaptation and analyze the reproducibility and concurrent validity of the PAQ-C and PAQ-A in a sample

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Assessment of energy expenditure in children using the RT3 accelerometer

Cited by 21 publications

References 24 publications

Gait in adolescent idiopathic scoliosis: energy cost analysis

Gait in adolescent idiopathic scoliosis: energy cost analysis

An evaluation of energy expenditure estimation by three activity monitors

Medida Da Atividade Física Em Jovens Brasileiros: Reprodutibilidade E Validade Do Paq-C E Do Paq-A

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