26 November 2012

Comparing energy cost between traditional and Western populations

Posted in English, K4b2/K5, Media

Comparing energy cost between traditional and Western populations

New York Times article presents a study where energy expenditure and other physiological data of hunter-gatherer populations are compared to their Western counterparts.

The article of the NYT is written by Herman Pontzer (Department of Anthropology, Hunter College, New York, USA), who was among the team that lead the scientific study.

The main objective of the study wwas to determine those aspects of Western lifestyle that are impacting on our species and pose the greatest risk of obesity. To evalutate this, it is important to study and compare daily energy expenditure and physical activity level of a non-Western population. Hadza are one of the few remaining populations of traditional hunter-gatherers living in a savannah-woodland environment in Northern Tanzania.

Studying diet and metabolism in Hadza foragers allowed the researchers to test the hypothesis that hunter-gatherers expend more energy each day than subjects in market and farming economies.

Energy expenditures during resting and walking were measured using COSMED K4b2 portable, wearable respirometry system.

The measurements of TEE among Hadza hunter-gatherers challenge the view that Western lifestyles result in abnormally low energy expenditure, and that decreased energy expenditure is a primary cause of obesity in developed countries.

See the New York Times article at the following link: click here

The full scientific artic can be downloaded free of charge at the following link: click here


Founded in 1980, COSMED is a privately owned company manufacturing Cardio Pulmonary and Metabolic Diagnostic Equipment. COSMED products include a full range of Spirometers, Pulmonary Function, Body Composition, Nutritional Assessment and Cardio Pulmonary Exercise systems, including Electrocardiographs, Ergometers and Assessment Software. COSMED solutions are aimed for either professional or medical use for many different applications like: Hospital, Clinics, Primary Care, University & Education in Human Physiology, Clinical Nutrition, Commercial Weight Management, Human Performance Centers, Sport Institutions and Health Club Industry. COSMED Headquarters are located in the province of Rome, Italy. COSMED has subsidiaries in the USA, China and Germany, and distributes its products internationally through a constantly growing distributor network covering more than 70 countries.