热量限制饮食在短期内能显著降低体重和腰围1。然而，许多人停止节食后会恢复部分或全部体重1。这种反弹现象源于身体的适应机制：失重后，食欲调节激素发生变化，使人更容易感到饥饿；同时身体提高能量利用效率，燃烧的热量减少1。
除了生理因素外，持久的饥饿感、生活方式习惯和加工食品的便利性也构成长期坚持的挑战1。澳大利亚政府提出了更可持续的建议，包括限制高盐、高糖和高脂肪食物的摄入，减少份量，增加身体活动，提前规划饮食，培养正念进食习惯，以及保持充足水分摄入1。特别提醒的是，孕妇、哺乳期妇女、儿童和青少年（无专家指导下）以及有进食障碍史者不适合采取热量限制饮食1。专家建议在尝试任何饮食改变前咨询执业营养师1。
Calorie-restricted diets do produce significant weight loss and reduced waist circumference in the short term, with studies spanning two to twelve weeks demonstrating measurable results 1. However, many people regain some or all of the weight once they stop dieting 1.
The difficulty in maintaining weight loss stems from biological adaptations triggered by the body during weight reduction 1. After losing weight, hormonal changes governing appetite regulation make individuals feel hungrier, while the body becomes more efficient at utilizing energy, resulting in fewer calories burned 1. These physiological responses, combined with persistent hunger, lifestyle factors, and the widespread availability of processed foods, create substantial obstacles to sustained weight management 1.
The Australian government recommends several strategies to support long-term dietary success: limiting foods high in salt, sugar, and fat; reducing portion sizes; increasing physical activity; planning meals in advance; practicing mindful eating; and maintaining adequate hydration 1. Certain groups should not attempt calorie restriction without professional guidance, including pregnant and breastfeeding women, children and adolescents, and those with a history of eating disorders 1. Before beginning any restricted diet, consulting a practicing nutritionist is advisable 1.
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