Department of Animal Science, State University of Maringá, Maringá, Brazil.
College of Agrarian and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Jaboticabal, Brazil.
J Anim Physiol Anim Nutr (Berl). 2019 Sep;103(5):1546-1555. doi: 10.1111/jpn.13127. Epub 2019 May 20.
Body composition and energy requirements are different between males and females in several species, and both interfere with weight loss. The aim of this study was to compare the total and regional body composition and energy requirements in obese male (n = 8) and female (n = 8) cats, during weight loss and weight maintenance over 17 subsequent weeks after regimen. The total and regional (thoracic and pelvic limbs, and trunk) body composition was assessed by dual-energy X-ray absorptiometry (DXA). Females exhibited a higher fat mass (FM) than males (p < 0.05), and the trunk was the site with greater fat accumulation regardless of gender. A 23.0 ± 2.8% reduction in body weight was followed by a 50.3 ± 9.4% and a 37.0 ± 8.9% reduction in fat in the trunk region in males and females respectively. Lean mass (LM) mobilization was also increased in the trunk (p < 0.05), and the loss of LM was associated with a reduction in bone mass. The energy intake to achieve the same rate of weight loss was 12.9 ± 3.4% higher in males (p < 0.05). The cats exhibited a gradual increase in energy requirements to maintain their body weight after weight loss (p < 0.05). It was concluded that obese cats mainly accumulate fat in the trunk. The reduction in lean mass after the regimen also occurred in the trunk, with no modifications in the skeletal muscle mass of the limbs. Neutered male cats have higher energy requirements than neutered females, and gender should be considered during obesity management in cats.
在许多物种中，男性和女性的身体成分和能量需求存在差异，两者都会干扰减肥。本研究的目的是比较肥胖雄性（n=8）和雌性（n=8）猫在减肥和减肥后 17 周体重维持期间的全身和局部身体成分和能量需求。通过双能 X 射线吸收法（DXA）评估全身和局部（胸部和四肢，以及躯干）身体成分。雌性的脂肪量（FM）高于雄性（p<0.05），无论性别如何，躯干都是脂肪积累的主要部位。体重下降 23.0±2.8%，随后雄性和雌性的躯干区域脂肪分别下降 50.3±9.4%和 37.0±8.9%。躯干中的瘦肉量（LM）动员也增加了（p<0.05），LM 的损失与骨量减少有关。为了达到相同的减肥速度，雄性的能量摄入量增加了 12.9±3.4%（p<0.05）。减肥后，猫的能量需求逐渐增加以维持体重（p<0.05）。结论是肥胖猫主要在躯干积累脂肪。减肥后，躯干中 LM 的减少也发生了，四肢的骨骼肌质量没有变化。去势雄性猫比去势雌性猫的能量需求更高，在猫的肥胖管理中应考虑性别因素。
