François Haman
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View article: Predictive equations fail to accurately assess resting metabolic rate in international elite male volleyball players
Predictive equations fail to accurately assess resting metabolic rate in international elite male volleyball players Open
The accurate estimation of daily energy requirements is important to inform athletes about their caloric needs and to prevent long-term low energy availability. Such estimations are often done by estimating energy expenditure. Recent data,…
View article: Cold weather operations: Preventive strategies in a military context
Cold weather operations: Preventive strategies in a military context Open
Military cold weather operations (CWOs) introduce a range of challenges, including extreme temperatures, strong winds, difficult terrain, and exposure to snow, ice, and water. Personnel undertaking these missions face a heightened risk of …
View article: Cold operational readiness in the military: from science to practice
Cold operational readiness in the military: from science to practice Open
Cold weather operations are logistically difficult to orchestrate and extremely challenging for soldiers. Decades of research and empirical evidence indicate that humans are extremely vulnerable to cold and that individual responses are hi…
View article: Brown adipose tissue metabolism in women is dependent on ovarian status
Brown adipose tissue metabolism in women is dependent on ovarian status Open
In rodents, loss of estrogen reduces brown adipose tissue (BAT) activity. Whether this is true in humans is not known. We found that BAT oxidative metabolism and glucose uptake were lower in postmenopausal compared to premenopausal women. …
View article: We are all exposed, but some are more exposed than others
We are all exposed, but some are more exposed than others Open
This paper defines functional cold exposure zones that illustrate whether a person is at risk of developing physical performance loss or cold weather injuries. Individual variation in body characteristics, activity level, clothing and prot…
View article: Exercise training enhances muscle mitochondrial metabolism in diet-resistant obesity
Exercise training enhances muscle mitochondrial metabolism in diet-resistant obesity Open
Canadian Institutes of Health Research (CIHR-INMD and FDN-143278; CAN-163902; CIHR PJT-148634).
View article: Brown Adipose Tissue—A Translational Perspective
Brown Adipose Tissue—A Translational Perspective Open
Brown adipose tissue (BAT) displays the unique capacity to generate heat through uncoupled oxidative phosphorylation that makes it a very attractive therapeutic target for cardiometabolic diseases. Here, we review BAT cellular metabolism, …
View article: Human vulnerability and variability in the cold: Establishing individual risks for cold weather injuries
Human vulnerability and variability in the cold: Establishing individual risks for cold weather injuries Open
Human tolerance to cold environments is extremely limited and responses between individuals is highly variable. Such physiological and morphological predispositions place them at high risk of developing cold weather injuries [CWI; includin…
View article: Impaired Cold Stimulated Supraclavicular Brown Adipose Tissue Activity in Young Boys with Obesity
Impaired Cold Stimulated Supraclavicular Brown Adipose Tissue Activity in Young Boys with Obesity Open
Childhood obesity is a growing worldwide problem. In adults, lower cold-induced brown adipose tissue (BAT) activity is linked to obesity and metabolic dysfunction; this relationship remains uncertain in children. In this cross-sectional st…
View article: Impaired Cold Stimulated Supraclavicular Brown Adipose Tissue Activity in Young Boys with Obesity
Impaired Cold Stimulated Supraclavicular Brown Adipose Tissue Activity in Young Boys with Obesity Open
Childhood obesity is a growing worldwide problem. In adults, lower cold-induced brown adipose tissue (BAT) activity is linked to obesity and metabolic dysfunction; this relationship remains uncertain in children. In this cross-sectional st…
View article: Impaired Cold-Stimulated Supraclavicular Brown Adipose Tissue Activity in Young Boys With Obesity
Impaired Cold-Stimulated Supraclavicular Brown Adipose Tissue Activity in Young Boys With Obesity Open
Childhood obesity is a growing worldwide problem. In adults, lower cold-induced brown adipose tissue (BAT) activity is linked to obesity and metabolic dysfunction; this relationship remains uncertain in children. In this cross-sectional st…
View article: Assessing the contribution of traditional foods to food security for the Wapekeka First Nation of Canada
Assessing the contribution of traditional foods to food security for the Wapekeka First Nation of Canada Open
The food security crisis and disproportionately high burden of dietary related disease amongst northern Indigenous populations in Canada continues to be a troubling reality with little sign of improvement. The Government of Canada is respo…
View article: Sex Disparities in Thermoregulatory and Metabolic Responses to Mild Cold Exposure Largely Explained by Differences in Body Mass and Body Surface Area
Sex Disparities in Thermoregulatory and Metabolic Responses to Mild Cold Exposure Largely Explained by Differences in Body Mass and Body Surface Area Open
Sex-related differences in thermoregulatory responses to cold exposure, such as differences in metabolic heat production and fuel selection, are often attributed to differences in morphology and body composition. Whether these differences …
View article: Elite Male Volleyball Players Are at Risk of Insufficient Energy and Carbohydrate Intake
Elite Male Volleyball Players Are at Risk of Insufficient Energy and Carbohydrate Intake Open
Elite volleyball athletes experience significant physical and psychological demands during the competitive season. The aim was to compare the dietary intake of male volleyball athletes with recommendations for sport and health, and to exam…
View article: Human performance research for military operations in extreme cold environments
Human performance research for military operations in extreme cold environments Open
There is an inseparable behavioral component to soldier performance in the Arctic, and even the best equipment does not benefit soldiers who have not trained in the actual environment. Training inexperienced soldiers to performance limits …
View article: Energy expenditure during pregnancy: a systematic review
Energy expenditure during pregnancy: a systematic review Open
Context Contrary to nutritional guidelines, accumulating evidence shows that pregnant women’s energy intakes remain stable throughout trimesters. Although pregnant women may eat below their needs or underreport their energy intakes, it is …
View article: MRI Reveals Human Brown Adipose Tissue Is Rapidly Activated in Response to Cold
MRI Reveals Human Brown Adipose Tissue Is Rapidly Activated in Response to Cold Open
Context In rodents, cold exposure induces the activation of brown adipose tissue (BAT) and the induction of intracellular triacylglycerol (TAG) lipolysis. However, in humans, the kinetics of supraclavicular (SCV) BAT activation and the pot…
View article: Relationship between the Daily Rhythm of Distal Skin Temperature and Brown Adipose Tissue <sup>18</sup>F-FDG Uptake in Young Sedentary Adults
Relationship between the Daily Rhythm of Distal Skin Temperature and Brown Adipose Tissue <sup>18</sup>F-FDG Uptake in Young Sedentary Adults Open
The present study examines whether the daily rhythm of distal skin temperature (DST) is associated with brown adipose tissue (BAT) metabolism as determined by 18 F-fluorodeoxyglucose ( 18 F-FDG) uptake in young adults. Using a wireless the…
View article: Energy Intake Requirements in Pregnancy
Energy Intake Requirements in Pregnancy Open
Energy intake requirements in pregnancy match the demands of resting metabolism, physical activity, and tissue growth. Energy balance in pregnancy is, therefore, defined as energy intake equal to energy expenditure plus energy storage. A d…
View article: Seven days of cold acclimation substantially reduces shivering intensity and increases nonshivering thermogenesis in adult humans
Seven days of cold acclimation substantially reduces shivering intensity and increases nonshivering thermogenesis in adult humans Open
Daily compensable cold exposure in humans reduces shivering by ~20% without changing total heat production, partly by increasing brown adipose tissue thermogenic capacity and activity. Although acclimation and acclimatization studies have …
View article: Brown Adipose Tissue Energy Metabolism in Humans
Brown Adipose Tissue Energy Metabolism in Humans Open
The demonstration of metabolically active brown adipose tissue (BAT) in humans primarily using positron emission tomography coupled to computed tomography (PET/CT) with the glucose tracer 18-fluorodeoxyglucose (18FDG) has renewed the inter…
View article: Shivering thermogenesis in humans: Origin, contribution and metabolic requirement
Shivering thermogenesis in humans: Origin, contribution and metabolic requirement Open
As endotherms, humans exposed to a compensable cold environment rely on an increase in thermogenic rate to counteract heat lost to the environment, thereby maintaining a stable core temperature. This review focuses primarily on the most im…
View article: Four‐week cold acclimation in adult humans shifts uncoupling thermogenesis from skeletal muscles to brown adipose tissue
Four‐week cold acclimation in adult humans shifts uncoupling thermogenesis from skeletal muscles to brown adipose tissue Open
Key points Muscle‐derived thermogenesis during acute cold exposure in humans consists of a combination of cold‐induced increases in skeletal muscle proton leak and shivering. Daily cold exposure results in an increase in brown adipose tiss…