caa a22 4500 388096918 CHVBK 20180307125306.0 cr unu---uuuuu 161130e199902 xx s 000 0 eng 10.1079/PNS19990016 doi S002966519900018X pii (NATIONALLICENCE)cambridge-10.1079/PNS19990016 The effect of inactivity on dietary intake and energy homeostasis [Elektronische Daten] Reduced physical activity commonly occurs in patients with disease or chronic disabilities, in the elderly, and in certain patients with obesity. Surprisingly, information on the effect of inactivity on energy homeostasis is scarce and often difficult to interpret. In models of reduced physical activity, such as space flights, bed-rest and confinement, subjects frequently lose weight (<5 %), predominantly in the form of fat-free mass. In some cases this is compensated by an increase in fat mass, which means that changes in weight are poor indicators of energy balance. The extent to which spontaneous reduction in energy intake (in most studies energy intake is fixed) compensates or overcompensates for the reduction in energy expenditure (mainly physical activity and to a small extent in BMR, typically <6 %) is largely underexamined. Preliminary observations suggesting that there is a preferential selection of low-energy-dense foods (low in fat) require confirmation under carefully controlled experimental conditions. It is concluded that a comprehensive and systematic evaluation is needed to address the effects and relevance of various degrees of physical inactivity to energy homeostasis, in relation to disease and space medicine. Copyright © The Nutrition Society 1999 Physical inactivity nationallicence Energy balance nationallicence Body composition nationallicence Ritz P. Human Nutrition Research Centre-Auvergne, BP 321, Clermont-Ferrand, 63009, France Elia M. Dunn Clinical Nutrition Centre, Hills Road, Cambridge CB2 2DH, UK Proceedings of the Nutrition Society Cambridge University Press 58/1(1999-02), 115-122 0029-6651 58:1<115 1999 58 PNS https://doi.org/10.1079/PNS19990016 text/html Onlinezugriff via DOI 1 conference jats NATIONALLICENCE 856 40 https://doi.org/10.1079/PNS19990016 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ritz P. Human Nutrition Research Centre-Auvergne, BP 321, Clermont-Ferrand, 63009, France NATIONALLICENCE 700 1- Elia M. Dunn Clinical Nutrition Centre, Hills Road, Cambridge CB2 2DH, UK NATIONALLICENCE 773 0- Proceedings of the Nutrition Society Cambridge University Press 58/1(1999-02), 115-122 0029-6651 58:1<115 1999 58 PNS CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge