Peter Weijs is Endowed Professor in Nutrition and Exercise at Amsterdam University of Applied Sciences. Since 1994 he works at the Amsterdam University of Applied Sciences (AUAS) where he heads a research group which focuses on promoting a healthy lifestyle in vulnerable groups through nutrition and exercise interventions. These interventions are developed and tested to maintain and restore daily functioning and health, with expertise in overweight, obesity, sarcopenia, body composition measurement, energy expenditure, protein requirements, and protein quality.