Department of Obesity and Endocrinology, Institute of Ageing and Chronic Disease, University of Liverpool, Leahurst Campus, Chester High Road, Neston, Wirral CH64 7TE, UK.
Br J Nutr. 2011 Oct;106 Suppl 1:S93-6. doi: 10.1017/S0007114511000584.
Weight rebound after successful weight loss is a well-known phenomenon in humans and dogs, possibly due to the fact that energy restriction improves metabolic efficiency, reducing post-weight-loss maintenance energy requirements (MER). The aim of the present study was to estimate post-weight-loss MER in obese pet dogs that had successfully lost weight and did not subsequently rebound. A total of twenty-four obese dogs, successfully completing a weight management programme at the Royal Canin Weight Management Clinic, University of Liverpool (Wirral, UK), were included. In all dogs, a period of >14 d of stable weight ( < 1 % change) was identified post-weight loss, when food intake was constant and activity levels were stable (assessed via owners' diary records). Post-weight-loss MER was indirectly estimated by determining dietary energy consumption during this stable weight period. Multivariable linear regression was used to identify factors that were associated with post-weight-loss MER. The mean length of stable weight after weight loss was 54 (SD 34.1) d. During this time, MER was 285 (SD 54.8) kJ/kg(0.75) per d. The rate of prior weight loss and food intake during the weight-loss phase was positively associated with post-weight-loss MER, while the amount of lean tissue lost was negatively associated with post-weight-loss MER. MER are low after weight loss in obese pet dogs (typically only 10 % more than required during weight-loss MER), which has implications for what should constitute the optimal diet during this period. Preserving lean tissue during weight loss may maximise post-weight-loss MER and help prevent rebound.
减肥成功后的体重反弹是人类和犬类中众所周知的现象，这可能是因为能量限制提高了代谢效率，从而降低了减肥后的维持能量需求（MER）。本研究的目的是估计成功减肥但随后未反弹的肥胖宠物犬的减肥后 MER。共纳入 24 只在利物浦大学皇家宠物营养中心（英国威尔拉尔）成功进行体重管理计划的肥胖犬。所有犬在减肥后均确定了稳定体重（体重变化 < 1%）期 >14 d，此时食物摄入量保持不变且活动水平稳定（通过主人的日记记录评估）。通过确定稳定体重期内的饮食能量消耗，间接估计减肥后 MER。使用多变量线性回归来确定与减肥后 MER 相关的因素。减肥后稳定体重的平均持续时间为 54（SD 34.1）d。在此期间，MER 为 285（SD 54.8）kJ/kg（0.75）/d。减肥前的体重减轻速度和减肥阶段的食物摄入量与减肥后 MER 呈正相关，而丢失的瘦组织量与减肥后 MER 呈负相关。肥胖宠物犬减肥后的 MER 较低（通常仅比减肥时 MER 高 10%），这对减肥期间的最佳饮食构成具有重要意义。在减肥过程中保留瘦组织可能会最大程度地提高减肥后 MER 并有助于防止反弹。
