Measuring Energy Expenditure in Habitually Active and Sedentary Pregnant Women

Stein, Aryeh D.; Rivera, José A.; Pivarnik, James M.

doi:10.1249/01.mss.0000079107.04349.9a

Cited by 54 publications

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“…Sports participation or structured exercise was extremely low throughout the study, hence, this effect is likely to be minimal and would not explain a decline in activity. In contrast to the present study, Stein et al (2003) detected no significant change in physical activity using recall, accelerometry and heart rate telemetry. The latter study, however, selected subjects on the basis of habitual activity levels, perhaps mitigating against the likelihood of observing changes during pregnancy.…”

Section: Discussioncontrasting

confidence: 99%

“…Activity diaries in the general population have been shown to overestimate physical activity (Conway et al, 2002). In pregnant women, activity diaries were shown to overestimate physical activity by around 400 kcal/day, whereas accelerometry underestimated activity by a similar amount compared with heart rate telemetry (Stein et al, 2003). However, both self-report activity and accerelometry are valuable methods for examining within-subject changes in physical activity, and for assigning rank order within a population, since the degree of over-or under estimation will be relatively consistent within individuals.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies employing accelerometry have not reported significant reductions in compliance over time. However, one study was cross-sectional (Chasan-Taber et al, 2004) and the other entailed laboratory visits on two consecutive days on two occasions across pregnancy (Stein et al, 2003). The former eliminated 23 days of recording on 14 subjects (total 54 subjects) due to failure to record accelerometer data; the latter found that recording time of actiwatch varied from 397 to 1055 min within any 24 h period, suggesting considerable variation in compliance.…”

Section: Discussionmentioning

confidence: 99%

“…Wrist actigraphy was used to study changes in women's sleep-wake cycles in pregnancy (Shinkoda et al, 1999), and mono-axial accelerometers have been employed to assess physical activity on two occasions in pregnancy (Stein et al, 2003). Actigraphy has recently been used to validate a pregnancy physical activity questionnaire, using only cross-sectional observations (Chasan-Taber et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Significant changes in physical activity among pregnant women in the UK as assessed by accelerometry and self-reported activity

2005

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Objective: Research on the impact of maternal physical activity on pregnancy outcomes has often employed subjective measures of physical activity obtained by diary or questionnaire. This study investigates the feasibility of using accelerometry as an objective measure of physical activity of pregnant women compared with subjective data obtained via activity recall among pregnant women. Design: Activity data were collected prospectively on 57 women at 12, 16, 25, 34 and 38 weeks of gestation. Total daily physical activity was assessed by ambulatory accelerometer and activity interview (self-report). Maternal personality variables (health value, extroversion) were assessed by established scales. Setting: Leicestershire, UK. Subjects: Pregnant women were recruited by voluntary participation via antenatal booking clinics. In all, 64 pregnant women with low-risk pregnancy were enrolled onto the study, of whom 57 completed the study. Results: Mean 24 h physical activity levels (PAL) decreased significantly from second to third trimester as assessed by self-report interview (1.51-1.29 Metabolic Equivalent TEE-h/day, Po0.01) and accelerometry (200.05-147.42 counts/min, Po0.01). The correlation between the two measures declined as pregnancy progressed (r value ranging from 0.55 to 0.08). Compliance with the accelerometers declined from 90% at 12 weeks to 47% at 34 weeks (Po0.01). Compliance with the self-report interviews was 100%. Those who fully complied with the accelerometry demonstrated a significantly higher health value (Po0.05) and a significantly greater level of extroversion (Po0.05) than those who did not. Conclusions: Accelerometers and self-reported activity interviews both indicated a significant decline in PAL during pregnancy. Although subjects showed a willingness to use both methods, accelerometers resulted in variable compliance with 72 h monitoring. Both techniques may be limited by the need to measure low levels of physical activity during the third trimester. Sponsorship: Cambridge Neurotechnology Ltd, UK, assisted with the provision of Actiwatch accelerometers.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Significant changes in physical activity among pregnant women in the UK as assessed by accelerometry and self-reported activity

2005

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“…According to Butte et al 1 , the traditional approach to the determination of nutritional requirements only considers the increase in the basal metabolic rate (BMR) of pregnant women, but may underestimate the true energy requirements since it does not consider energy expenditure during physical activity and the thermic effect of feeding. Thus, efforts have been made to determine not only the increase in the BMR during pregnancy, but also that resulting from physical exercise in order to potentiate its health benefits for the woman and child [1][2][3][4][5] . Since the leisure physical activity most commonly performed by women during pregnancy is walking 6 , studies have investigated the energy expenditure of women during this type of exercise.…”

Section: Introductionmentioning

confidence: 99%

Comparação entre equações preditivas do gasto calórico de gestantes em repouso e exercício

Fernandes

Takito

2015

Rev. Bras. Cineantropom. Desempenho Hum.

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-The regular changes that occur during pregnancy increase energy expenditure at rest and during exercise. Prediction models are practical tools that facilitate the estimation of energy expenditure. The objective of this study was to analyze the reliability of prediction models of energy expenditure for pregnant women in two situations, at rest and during light-intensity exercise, compared to indirect calorimetry. Energy expenditure was measured in 10 pregnant women during the second trimester of gestation (23.5 ± 3.7 weeks) at rest and during light-intensity treadmill walking (4 km/h) using indirect calorimetry and the prediction models proposed by Hronek (rest) and Pivarnik (exercise). The intraclass correlation coefficient (ICC) and Bland-Altman plots were used for comparison of the methods. A low correlation was observed at rest and during exercise [ICC=0.531 (-0.185; 0.814) and ICC=0.124 (-1.213; 0.653), respectively]. At rest, daily energy expenditure tended to be overestimated with increasing indirect calorimetry values. During exercise, the equation tended to underestimate the energy expenditure of pregnant women as it increased. In conclusion, the prediction models analyzed showed a low correlation with indirect calorimetry, overestimating daily energy expenditure at rest and underestimating energy expenditure during light-intensity exercise. Thus, practical and low-cost tools such as predictive equations cannot always be used safely in professional practice and care should be taken to apply them to groups with altered physiological conditions, such as pregnant women. Key words: Energy metabolism; Exercise; Pregnant women. 0.814]) quanto para o exercício 0.653] Resumo -As alterações naturais características da gestação resultam no aumento do gasto energético das mulheres, tanto durante o repouso quanto durante o exercício. As equações de predição surgem como ferramentas práticas para facilitar a estimativa desse dispêndio de energia, importante ao equilíbrio energético adequado e saudável deste período. O estudo teve como objetivo analisar a confiabilidade de equações de predição do gasto calórico desenvolvidas para gestantes no repouso e na atividade física de intensidade leve quando comparadas à calorimetria indireta. Obteve-se o gasto calórico de 10 mulheres no segundo trimestre gestacional (23.5±3.7 semanas), durante o repouso e na caminhada (4 km/h) por calorimetria indireta, comparando-o com o valor obtido nas equações de Hronek para o repouso, e de Pivarnik para a caminhada. Para a comparação, foi realizado o coeficiente de correlação intraclasse (CCI) e a análise gráfica de

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Exercise Recommendations for the Obese Gravida

Rompolski¹,

Jakicic²

2011

Pregnancy in the Obese Woman

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Measuring Energy Expenditure in Habitually Active and Sedentary Pregnant Women

Abstract: All methods were sensitive to variation in both the rate of EE and the duration over which activity was monitored. Accelerometry and PAR are useful methods for categorizing EE in epidemiologic studies among pregnant women but absolute estimates are biased relative to HR.

Cited by 54 publications

References 26 publications

Significant changes in physical activity among pregnant women in the UK as assessed by accelerometry and self-reported activity

Significant changes in physical activity among pregnant women in the UK as assessed by accelerometry and self-reported activity

Comparação entre equações preditivas do gasto calórico de gestantes em repouso e exercício

Exercise Recommendations for the Obese Gravida

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