Static macros are like a playlist that never shuffles — technically fine, but not tuned to what your body just experienced. The reality of sports nutrition is that your calorie and macro needs shift meaningfully depending on what you did in the last 24 hours.
What happens to your macros after training
After a strength session, your muscles are in an active repair state. Protein synthesis is elevated for up to 48 hours. Glycogen stores in the trained muscles are partially or fully depleted. Your metabolic rate ticks up slightly for the next 6–24 hours (the EPOC effect). Your body is, in short, a better nutrient-partitioning machine than it was an hour ago.
A static plan that gives you the same 2,200 calories on a heavy leg day and a rest day is ignoring all of this physiology.
How glycogen depletion changes your carb targets
During a moderate-to-high-intensity session lasting 60+ minutes, you can deplete 250–500 g of muscle glycogen. Replenishing this is the primary job of your post-workout meal — and the window is real, even if it's wider than the 30-minute myth suggests.
- →High-volume strength session (5+ sets per muscle group): increase carbs by 40–80 g post-workout
- →Moderate cardio (45–60 min at 65–75% HR max): increase carbs by 20–40 g
- →Short HIIT session (20–30 min): prioritise protein over carbs; glycogen depletion is modest
- →Yoga / mobility / rest day: standard macros apply; potentially reduce overall calories by 100–150
Protein timing: the window is longer than the myth
The '30-minute anabolic window' is outdated. Research shows muscle protein synthesis stays elevated for 3–5 hours post-exercise in well-fed athletes. What matters more than speed is total daily protein intake — typically 1.6–2.2 g per kg of bodyweight for active individuals — distributed across 3–5 meals.
If you train fasted the post-workout meal matters more. If you had a solid pre-workout meal you have a wider window. FoodNutrix factors in both your training time and your last meal when calculating your adaptive plan.
How FoodNutrix adapts in real time
When you log a workout — or when your wearable syncs it automatically — FoodNutrix recalculates your remaining daily plan. Calorie and macro targets for your next meal shift to account for what you just burned and what your muscles now need. Meal suggestions change accordingly: more rice, less fat on heavy lift days. More protein and greens on rest days.
A practical example
Monday: heavy lower body session, 70 minutes. FoodNutrix adds a post-workout snack (chicken and rice, 480 kcal, 40 g protein, 52 g carbs) and adjusts dinner to be lighter on carbs since you've already hit the replenishment target.
Wednesday: yoga and a 30-minute walk. No glycogen depletion to speak of. Your plan shifts toward lighter, higher-veg meals — same weekly calories, just redistributed to where they're most useful.