Why Nutrition Is the Foundation
You can have the best workout program in the world, but if your nutrition is off, you'll struggle to see results. Training is the stimulus; nutrition is the recovery, the fuel, and the raw material for everything your body builds.
This guide covers the core principles that apply to everyone - whether your goal is fat loss, muscle gain, or just feeling better day to day.
Understanding Calories
At its most basic, your body weight is governed by energy balance:
- Caloric surplus → weight gain
- Caloric deficit → weight loss
- Maintenance → weight stays stable
This isn't the full picture (hormones, sleep, and stress all matter), but it's the most important lever to understand first.
How many calories do you need?
Your Total Daily Energy Expenditure (TDEE) is the number of calories you burn in a day. It has four components:
- BMR (Basal Metabolic Rate) - calories burned just to stay alive
- NEAT - Non-exercise activity thermogenesis (fidgeting, walking, daily movement)
- TEF - Thermic effect of food (digesting food burns ~10% of calories)
- EAT - Exercise activity thermogenesis (your actual workouts)
A rough starting point: multiply your body weight in kg by 30–33 for maintenance. Use FitKarta's calculator for a personalised number.
The Three Macronutrients
Protein
Protein is the most important macronutrient for body composition. It:
- Builds and repairs muscle tissue
- Keeps you full (highest satiety of the three macros)
- Has the highest thermic effect (~25–30% of calories burned digesting it)
Target: 1.6–2.2g of protein per kg of body weight per day.
Good Indian sources: paneer, dal, rajma, chole, eggs, chicken, Greek yogurt (hung curd), tofu, soya chunks.
Carbohydrates
Carbs are your body's primary fuel source, especially for high-intensity exercise. They are not the enemy.
- Complex carbs (rice, roti, oats, sweet potato) provide sustained energy
- Fibre (dal, vegetables, whole grains) supports gut health and satiety
- Simple sugars are fine in moderation - timing around workouts helps
Target: Fill the remainder of your calories after setting protein and fat. Prioritise whole food sources.
Fat
Dietary fat is essential for hormone production, brain function, and absorption of fat-soluble vitamins (A, D, E, K).
- Don't drop below ~0.8g/kg body weight
- Prioritise unsaturated fats (nuts, seeds, olive oil, fish)
- Limit trans fats and excess saturated fats
Micronutrients Matter
Vitamins and minerals don't provide calories, but deficiencies will undermine your progress.
Common deficiencies in India:
| Nutrient | Why it matters | Sources |
|---|---|---|
| Vitamin D | Muscle function, immunity, testosterone | Sunlight, eggs, fortified milk |
| Iron | Oxygen transport, energy | Leafy greens, rajma, meat |
| Calcium | Bone strength, muscle contraction | Dairy, ragi, sesame |
| B12 | Energy, nerve function | Eggs, dairy, fortified foods |
| Magnesium | Sleep, stress, 300+ enzyme reactions | Nuts, seeds, dark chocolate |
If you're vegetarian or vegan, a B12 supplement is almost always necessary. Consider getting bloodwork done annually.
Meal Timing and Frequency
The research is clear: total daily intake matters far more than meal timing. That said, some principles help:
Pre-workout
Eat a carb-rich meal 1–2 hours before training. This tops up muscle glycogen and improves performance.
Example: rice + dal, or banana + peanut butter on roti.
Post-workout
Consume protein within 2 hours of training to support muscle protein synthesis.
Example: paneer bhurji, egg whites, or a protein shake with a piece of fruit.
Meal frequency
3–5 meals per day works well for most people. What matters is hitting your daily targets - not whether you eat at 6am or 9am.
Hydration
Most people underestimate how much dehydration affects performance and recovery.
- Minimum: 35ml per kg of bodyweight per day
- Exercise: Add 500ml per hour of training
- Heat/humidity (Indian summers): Add more
Signs of dehydration: dark urine, headaches, reduced performance, muscle cramps.
Electrolytes matter during longer sessions - coconut water, a pinch of salt in water, or sports drinks work.
How to Track Without Obsessing
FitKarta's nutrition tracker lets you log meals using an Indian food database - including homemade dal, sabzi, and regional dishes that other apps miss entirely.
Getting started:
- Set your calorie target (use the in-app calculator)
- Set a protein target (start with 1.8g/kg)
- Track consistently for 2–3 weeks to understand your baseline
- Adjust based on real data, not guesswork
You don't need to track forever. Most people track for 3–6 months, learn portion awareness, then intuitively maintain without logging.
Common Mistakes to Avoid
Eating too little protein. The most common mistake. Protein keeps you full and preserves muscle in a deficit.
Cutting calories too aggressively. A 300–500 kcal deficit is sustainable. A 1,000 kcal deficit leads to muscle loss, hunger, and eventual rebound.
Demonising food groups. Carbs, fats, and even sugar have a place in a balanced diet. Restriction breeds bingeing.
Ignoring liquid calories. Chai with milk and sugar, fresh juice, alcohol - these add up fast and often fly under the radar.
Weekend bingeing. Eating at a deficit Mon–Fri and a large surplus on weekends often results in zero net progress.
The Nutrition OS Approach
FitKarta treats nutrition like the system it is:
- Set clear targets based on your goals
- Track without judgment - data is just data
- Adjust every 2–3 weeks based on results
- Account for Indian food properly - no more approximating
- Sync with cycle phases if you use the menstrual tracker (hormone fluctuations affect hunger and metabolism)
Nutrition isn't about eating perfectly. It's about eating consistently well enough that your body can do what you're asking it to do.
Start simple. Hit your protein. Drink your water. The rest can be refined over time.