Banca de DEFESA: MATEUS DE LIMA MACENA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MATEUS DE LIMA MACENA
DATE: 22/02/2022
TIME: 13:30
LOCAL: https://meet.google.com/gcm-voqt-sjo
TITLE:

The relationship between total energy expenditure and physical activity in low-income women living in an impoverished urban area

KEY WORDS:

Accelerometry. Energy metabolism. Exercise. Homeostasis. Poverty.

PAGES: 61
BIG AREA: Ciências da Saúde
AREA: Nutrição
SUMMARY:

The use of the physical activity to obtain a negative energy balance is based on the linear model (additive or factorial) of the total energy expenditure (TEE), that is, from its practice, as the physical activity level (PAL) increases, the TEE it also increases. However, there are critics of this model and a second proposal to describe this relationship has emerged more recently, known as the non-linear (constrained) model. In this second model, the body adapts to higher levels of physical activity to keep the TEE within a narrow homeostatic range. Thus, based on the main article, this dissertation has as its objective to assess whether the relationship between TEE and PAL of low-income women living in an impoverished urban area behaves linearly or not. This is a cross-sectional study, which included adult women aged between 19 and 45 years, with body mass index (BMI) ≥ 18.5 kg/m2, mothers or caregivers of children with short stature attended at the Centro de Recovery and Nutrition Education (CREN). Anthropometric, hormonal (insulin and thyroid axis hormones), TEE (by double-labeled water), body composition (by deuterium) and PAL (metabolic equivalent of task (MET) by triaxial accelerometer) data were collected. Adjusted-TEE models were calculated incorporating the residuals of these variables mentioned. And the evaluation of the relationship between MET and adjusted-TEE was done through three different analyses: linear regression, non-linear regression and point-of-change regression, to identify the plateau of this relationship. Fifty-five women were included with a mean age of 31 ± 5 years, and BMI of 27.47 ± 4.59 kg/m2. It was possible to observe a positive and linear relationship between the adjusted-TEE and the MET (β = 16.10 kcal; 95% CI: 2.59; 29.60; adjusted R² = 0.08). The change point was identified at the MET value of 256.50 (SD = 4.46; adjusted R2 = 0.13). The association between the adjusted-TEE and the MET before the change point was stronger (β = 30.36 kcal; 95% CI: 5.82; 54.90; adjusted R2 = 0.11) than the association in the linear model, and this association stop existing when it was evaluated in individuals after the change point (β = -39.34 kcal; 95% CI: -99.84; 21.15; adjusted R2 = 0.08). Thus, we conclude that the non-linear model seems to be more adequate to describe the TEE of low-income women living in an impoverished urban area than the linear model, since this linear and additive relationship seems to be true only up to a certain amount of physical activity. However, we also emphasize that the practice of physical activity should clearly be recommended for all individuals, since it is superior to physical inactivity for several reasons.

BANKING MEMBERS:
Externo à Instituição - Ezequiel Moreira Gonçalves - UNICAMP
Interno - 1926612 - LUIZ RODRIGO AUGUSTEMAK DE LIMA
Presidente - 1130431 - NASSIB BEZERRA BUENO