BMR, TDEE and exact calorie targets for weight loss, maintenance and muscle gain at age 64.
Using the Mifflin-St Jeor equation with average US height and weight for a man aged 64, the resting metabolic rate (BMR) is approximately 1669 kcal/day. With typical daily activity included, total calorie expenditure (TDEE) ranges from 2002 kcal (sedentary) to 2878 kcal (very active).
| Goal | Daily Calories | Expected Result |
|---|---|---|
| 🔵 Aggressive weight loss | 1544 kcal | ~0.75 kg/week |
| 📉 Weight loss | 1794 kcal | ~0.5 kg/week |
| ✅ Maintenance | 2294 kcal | Weight stable |
| 💪 Lean bulk | 2594 kcal | ~0.25 kg/week |
| 🏋️ Aggressive bulk | 2794 kcal | ~0.5 kg/week |
| Activity Level | Description | Daily Calories |
|---|---|---|
| Sedentary | Desk job, minimal movement | 2002 kcal |
| Lightly active | 1–3 workouts/week | 2294 kcal |
| Moderately active | 3–5 workouts/week | 2586 kcal |
| Very active | Hard training 6–7 days/week | 2878 kcal |
Metabolic rate declines approximately 1–2% per decade after age 30, driven primarily by muscle loss (sarcopenia) rather than any inherent slowdown. At age 64, your BMR of 1669 kcal reflects your current muscle mass, height and hormonal status. The single most effective way to maintain or raise your BMR is resistance training — each kilogram of lean muscle burns roughly 13 kcal/day at rest.
| Age | Estimated BMR (man) | Change vs age 64 |
|---|---|---|
| 54 | 1719 kcal | +50 kcal |
| 59 | 1694 kcal | +25 kcal |
| 64 | 1669 kcal | — |
| 69 | 1644 kcal | -25 kcal |
| 70 | 1639 kcal | -30 kcal |
| Macro | % of Calories | Grams/day | Calories |
|---|---|---|---|
| Protein | 30% | 172 g | 688 kcal |
| Carbohydrates | 40% | 229 g | 916 kcal |
| Fat | 30% | 76 g | 684 kcal |
At age 64, protein intake is especially important. Aim for at least 71–89 g/day to maintain muscle mass, whether you're in a deficit, at maintenance, or in a surplus.
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