**About the Editors**

#### **Arie Nieuwenhuizen**

Arie G. Nieuwenhuizen is an assistant professor in human physiology at Human and Animal Physiology (HAP) of Wageningen University, Wageningen, The Netherlands. His main research topic is energy metabolism in human health and disease, with specific reference to skeletal muscle tissue and including influences of nutrition, exercise and aging. In this respect, the non-invasive techniques to assess energy metabolism in humans have his special interest, resulting in the successful application of techniques such as indirect calorimetry, analyses of volatile organic compounds in exhaled air and near-infrared spectroscopy to assess skeletal muscle mitochondrial capacity. He has published more than 70 scientific papers and co-organizes a post-graduate course "Energy Metabolism & Body Composition".

#### **Evert van Schothorst**

Evert M. van Schothorst is an associate professor in molecular physiology at Human and Animal Physiology (HAP) of Wageningen University, Wageningen, The Netherlands. His main research topics are energy metabolism from the whole body to molecular mechanisms, especially in the field of adipose tissue and insulin resistance, using nutrients and food bioactive compounds to improve white adipose tissue function in preclinical models. More recently, he focussed specifically on nutritional programming from the post-weaning period onwards by carbohydrates. This also provided him the means to extend the standard indirect calorimetry system to not only measure non-invasively and real-time energy metabolism (energy expenditure and substrate usage), but also to be the first to measure gut microbiota fermentation activity by measuring methane and hydrogen gasses. Furthermore, he incorporated 13CO2 and 12CO2 sensors, which enables measuring fluxes using 13C-labeled substrates. He has published over 90 scientific papers. He is a member of the European Association for the Study of Diabetes (EASD), secretary and member of the Dutch Association for the Study of Obesity (NASO), and co-organizer of post-graduate courses focussing on 'Metabolic programming', 'Functional and omics analysis of carotenoid interventions', and 'Temperature and Metabolism: Implications for nutritional studies'.
