This guide explains tdee for senior citizens: adjusting calorie goals for lower activity levels using widely referenced CDC and WHO standards. It is written as plain-language education to help you interpret your own measurements — not as a substitute for personalized medical advice.
About TDEE for Senior Citizens: Adjusting Calorie Goals for Lower Activity Levels
Basal Metabolic Rate (BMR) is the calories your body burns at complete rest to keep you alive — breathing, circulation, and cell repair. Total Daily Energy Expenditure (TDEE) adds the energy of daily activity, digestion, and exercise. BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age(years) + s, where s is +5 for men and −161 for women. This Mifflin–St Jeor equation is the most validated modern formula.
From BMR to a daily calorie target
Multiply BMR by an activity factor to estimate TDEE. A moderate deficit below TDEE (about 10–20%, or roughly 300–500 kcal/day for many adults) supports gradual fat loss while preserving muscle; a small surplus supports muscle gain.
- Sedentary (little or no exercise): BMR × 1.2
- Lightly active (1–3 days/week): BMR × 1.375
- Moderately active (3–5 days/week): BMR × 1.55
- Very active (6–7 days/week): BMR × 1.725
- Extra active (physical job + training): BMR × 1.9
Why metabolism falls with age
BMR typically declines with age, mainly from age-related loss of muscle (sarcopenia) and hormonal shifts. Strength training and adequate protein help preserve muscle and metabolic rate. Modern formulas such as Mifflin–St Jeor include age for this reason.
Recalculate as your body changes
BMR falls with age and with weight loss, so revisit your numbers every few months or after significant changes in weight, training, or life stage. Treat TDEE as an estimate to adjust against real-world results over weeks.
Try Our Free Calculators
Want to run the numbers yourself? Use these free tools: