卡路里计算器 - 每日所需卡路里

计算器使用经科学验证的公式，如米弗林-圣杰奥方程，来估算您的需求。虽然它提供了一个良好的起点，但您可能需要根据自己的个人反应和进展进行调整。

保持平均摄入量的一致性固然重要，但日常摄入量略有波动也是正常且健康的。应该关注你的每周平均摄入量，而不是每天都追求精确的数字。

Published in 1990 in the American Journal of Clinical Nutrition, it estimates resting energy expenditure from weight, height, age and sex. It is widely used because it tracked measured resting expenditure reasonably well in mixed adult groups. It is still an estimate.

Sites use different equations (Harris-Benedict, Katch-McArdle, Mifflin-St Jeor), different activity multipliers, and different deficit rules. Compare the formula and the activity assumption, not just the final number.

A common planning range is 300–500 kcal/day below estimated maintenance, or about 0.25–0.75% of body weight per week. Aggressive deficits raise the chance of muscle loss, fatigue and rebound. Medical diets belong under clinical supervision.

Activity multipliers already include a lifestyle activity estimate. Adding a full tracker-estimated workout on top often double-counts. If you train very hard, raise the activity factor or add a modest, consistent amount rather than chasing the watch.

The estimate may be high, tracking may be incomplete (oils, drinks, bites), water weight can hide fat loss for weeks, and medications or medical conditions can change expenditure. Recalculate after a 3–4 week trend, not after three days.

Adaptive thermogenesis can reduce expenditure beyond what weight loss alone predicts. It is real but usually modest. Strength training, adequate protein and avoiding extreme deficits reduce the practical impact.

No. Energy needs during growth are different, and unsupervised restriction is harmful. Use a paediatric clinician or registered dietitian.

Energy still balances, but food quality changes hunger, hormones, micronutrients and how easy the target is to hit. 2,000 kcal of ultra-processed food and 2,000 kcal of mostly whole food are not equivalent eating experiences.