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Influence of dietary protein level on body composition and energy expenditure in calorically restricted overweight cats
Author(s) -
des Courtis X.,
Wei A.,
Kass P. H.,
Fascetti A. J.,
Graham J. L.,
Havel P. J.,
Ramsey J. J.
Publication year - 2015
Publication title -
journal of animal physiology and animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.651
H-Index - 56
eISSN - 1439-0396
pISSN - 0931-2439
DOI - 10.1111/jpn.12239
Subject(s) - overweight , lean body mass , weight loss , cats , endocrinology , resting energy expenditure , medicine , calorie , zoology , energy expenditure , chemistry , doubly labeled water , composition (language) , body weight , biology , obesity , linguistics , philosophy
Summary High‐protein ( HP ) diets help prevent loss of lean mass in calorie‐restricted ( CR ) cats. However, it is not entirely known whether these diets also induce changes of energy expenditure during periods of CR . To investigate this issue, sixteen overweight cats were fed either a high‐protein [( HP ), 54.2% of metabolizable energy ( ME )] or a moderate‐protein [( MP ), 31.5% of ME ] diet at 70% of their maintenance energy intakes for 8 weeks, and energy expenditure, energy intake, body weight and composition, and serum metabolites and hormones were measured. While both groups of cats lost weight at a similar rate, only cats eating the HP diet maintained lean mass during weight loss. Indirect respiration calorimetry measurements revealed that both total and resting energy expenditure (kcal/d) significantly decreased during weight loss for both treatment groups. However, only cats eating the MP diet exhibited significant decreases of total and resting energy expenditures after energy expenditure was normalized for body weight or lean mass. Results from this study suggest that in addition to sparing the loss of lean mass, feeding HP diets to overweight cats in restricted amounts may be beneficial for preventing or minimizing decreases of mass‐adjusted energy expenditure during weight loss.