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Université de Fribourg

Low 24-hour core body temperature as a thrifty metabolic trait driving catch-up fat during weight regain after caloric restriction

Calonne, Julie ; Arsenijevic, Denis ; Scerri, Isabelle ; Miles-Chan, Jennifer L. ; Montani, Jean-Pierre ; Dulloo, Abdul G.

In: American Journal of Physiology-Endocrinology and Metabolism, 2019, vol. 317, no. 4, p. E699–E709

The recovery of body weight after substantial weight loss or growth retardation is often characterized by a disproportionately higher rate of fat mass vs. lean mass recovery, with this phenomenon of “preferential catch-up fat” being contributed by energy conservation (thrifty) metabolism. To test the hypothesis that a low core body temperature (Tc) constitutes a thrifty metabolic trait...

Université de Fribourg

Reduced skeletal muscle protein turnover and thyroid hormone metabolism in adaptive thermogenesis that facilitates body fat recovery during weight regain

Calonne, Julie ; Isacco, Laurie ; Miles-Chan, Jennifer L. ; Arsenijevic, Denis ; Montani, Jean-Pierre ; Guillet, Christelle ; Boirie, Yves ; Dulloo, Abdul G.

In: Frontiers in Endocrinology, 2019, vol. 10, p. -

Objective: The recovery of body composition after weight loss is characterized by an accelerated rate of fat recovery (preferential catch-up fat) resulting partly from an adaptive suppression of thermogenesis. Although the skeletal muscle has been implicated as an effector site for such thrifty (energy conservation) metabolism driving catch-up fat, the underlying mechanisms remain to be...

Université de Fribourg

Assessment of the dose–response relationship between meal protein content and postprandial thermogenesis: effect of sex and the oral contraceptive pill

Duhita, Maharani R. ; Schutz, Yves ; Montani, Jean-Pierre ; Dulloo, Abdul G. ; Miles-Chan, Jennifer L.

In: Nutrients, 2019, vol. 11, no. 7, p. 1599

Implementation of efficacious dietary interventions to regulate energy balance requires understanding of the determinants of individual response. To date, information regarding individual variability in response to elevated meal protein content is lacking. This study investigates whether sex and/or oral contraceptive pill (OCP) use play a role in the response to elevated meal protein in 21...

Université de Fribourg

Oral contraceptive pill alters acute dietary protein‐induced thermogenesis in young women

Duhita, Maharani Retna ; Schutz, Yves ; Montani, Jean-Pierre ; Dulloo, Abdul G. ; Miles-Chan, Jennifer L.

In: Obesity, 2017, vol. 25, no. 9, p. 1482–1485

Objective: There is much interest in the role of dietary protein for weight control. However, there remains a need to characterize individual determinants of the thermogenic effects of protein. This study aimed to investigate the influence of menstrual cycle phase and the combined, monophasic oral contraceptive pill on the thermogenic response to a standardized high-protein (HP) versus...

Université de Fribourg

Collateral fattening in body composition autoregulation: its determinants and significance for obesity predisposition

Dulloo, Abdul G. ; Miles-Chan, Jennifer L. ; Schutz, Yves

In: European Journal of Clinical Nutrition, 2018, vol. 72, no. 5, p. 657–664

Collateral fattening refers to the process whereby excess fat is deposited as a result of the body’s attempt to counter a deficit in lean mass through overeating. Its demonstration and significance to weight regulation and obesity can be traced to work on energy budget strategies in growing mammals and birds, and to men recovering from experimental starvation. The cardinal features of...

Université de Fribourg

Nutrition, movement and sleep behaviours: their interactions in pathways to obesity and cardiometabolic diseases

Dulloo, Abdul G. ; Miles-Chan, Jennifer L. ; Montani, Jean-Pierre

In: Obesity Reviews, 2017, vol. 18, no. S1, p. 3–6

Among the multitude of dietary and lifestyle behaviours that have been proposed to contribute to the obesity epidemic, those that have generated considerable research scrutiny in the past decade are centred upon sleep behaviours, sedentary behaviours (sitting or lying while awake) and diminished low-level physical activities of everyday life, with each category of behaviours apparently...

Université de Fribourg

Isometric thermogenesis at rest and during movement: a neglected variable in energy expenditure and obesity predisposition

Dulloo, Abdul G. ; Miles-Chan, Jennifer L. ; Montani, Jean-Pierre ; Schutz, Yves

In: Obesity Reviews, 2017, vol. 18, no. S1, p. 56–64

Isometric thermogenesis as applied to human energy expenditure refers to heat production resulting from increased muscle tension. While most physical activities consist of both dynamic and static (isometric) muscle actions, the isometric component is very often essential for the optimal performance of dynamic work given its role in coordinating posture during standing, walking and most...

Université de Fribourg

Reliability of low‐power cycling efficiency in energy expenditure phenotyping of inactive men and women

Fares, Elie-Jacques ; Isacco, Laurie ; Monnard, Cathriona R. ; Miles-Chan, Jennifer L. ; Montani, Jean-Pierre ; Schutz, Yves ; Dulloo, Abdul G.

In: Physiological Reports, 2017, vol. 5, no. 9, p. e13233

Standardized approaches to assess human energy expenditure (EE) are well defined at rest and at moderate to high‐intensity exercise, but not at light intensity physical activities energetically comparable with those of daily life (i.e., 1.5–4 times the resting EE, i.e., 1.5–4 METs). Our aim was to validate a graded exercise test for assessing the energy cost of low‐intensity dynamic...

Université de Fribourg

Energy expenditure and substrate oxidation in response to side-alternating whole body vibration across three commonly-used vibration frequencies

Fares, Elie-Jacques ; Charrière, Nathalie ; Montani, Jean-Pierre ; Schutz, Yves ; Dulloo, Abdul G. ; Miles-Chan, Jennifer L.

In: PLOS ONE, 2016, vol. 11, no. 3, p. e0151552

There is increasing recognition about the importance of enhancing energy expenditure (EE) for weight control through increases in low-intensity physical activities comparable with daily life (1.5–4 METS). Whole-body vibration (WBV) increases EE modestly and could present both a useful adjuvant for obesity management and tool for metabolic phenotyping. However, it is unclear whether a...

Université de Fribourg

Body composition-derived BMI cut-offs for overweight and obesity in Indians and Creoles of Mauritius: comparison with Caucasians

Hunma, S ; Ramuth, H ; Miles-Chan, Jennifer L. ; Schutz, Yves ; Montani, Jean-Pierre ; Joonas, N ; Dulloo, Abdul G.

In: International Journal of Obesity, 2016, vol. 40, no. 12, p. 1906–1914

Global estimates of overweight and obesity prevalence are based on the World Health Organisation (WHO) body mass index (BMI) cut-off values of 25 and 30 kg m⁻², respectively. To validate these BMI cut-offs for adiposity in the island population of Mauritius, we assessed the relationship between BMI and measured body fat mass in this population according to gender and...