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Dehydration in India: What Actually Works
You lose water faster in Chennai humidity than most hydration advice accounts for. Most of it was written for a cooler, drier climate and copy-pasted onto Indian conditions. Here's what actually holds up.
Why India Is a Harder Problem
Four things stack against you here that most guides ignore:
- Heat that doesn't quit. 45°C summers across the north, 80%+ humidity on the coasts. Different problems, same result: more sweat, less evaporation.
- Chai and spice. Both push fluid loss up. Neither shows up on a standard hydration checklist.
- Pollution. Heavier breathing in bad air means more respiratory water loss, especially for runners in Delhi or Mumbai.
- AC offices. Kill your thirst cues for eight hours, then you're playing catch-up before an evening run.
Point is: a hydration plan built for London doesn't survive contact with a Bangalore summer.
Spotting It Before It Wrecks Your Session
Early signs: dry mouth, fatigue that sleep doesn't fix, afternoon headaches, dizziness on standing, dark urine.
Performance signs: cramping, slower reaction time, endurance dropping mid-session, heart rate creeping up for no reason.
Even mild dehydration (2% of body weight) measurably hurts output and focus before you'd call yourself "thirsty." That's the whole problem with waiting for thirst.
Get help immediately if: rapid heartbeat, confusion, fainting, no sweat despite heat, or no urination for 8+ hours.
Four Myths, Killed
"8 glasses a day is the rule." For everyone? No. A cricketer in Chennai and someone doing gentle yoga in Shimla are not the same person with the same needs.
"Thirst tells you when to drink." By the time you're thirsty in Indian heat, you're already behind. Spice masks the signal, AC dulls it further.
"Clear urine = perfectly hydrated." Pale yellow, yes. Clear can mean overhydration, which is its own risk on long runs.
"Sports drinks beat water, always." For a 30-minute gym session, water's fine. Past 60 minutes in Indian heat, you need electrolytes, not just fluid.
The Actual Protocol
Before: Hydrate the night before early runs, not the morning of. Water by the bed, first thing on waking.
During:
- Running: ~200ml every 2-3km
- Cycling: ~250ml every 15-20 minutes
- Gym: sip between sets, 300-500ml over the hour
- Anything past 60 minutes: electrolytes, not plain water
After: Replace 1.5x what you sweated out. Keep sipping for the next 24 hours, not just the next 20 minutes.
Climate adjustment, roughly:
| Climate | Move |
|---|---|
| Hot & dry (Rajasthan, Gujarat) | +25-30% baseline intake |
| Hot & humid (Mumbai, Kolkata) | Prioritize electrolyte replacement over volume |
| Moderate (Bangalore, Pune) | Standard intake, scale with activity |
| Hill stations | Don't trust reduced thirst, stay consistent |
Where UP&RUN Fits
Water handles the volume. It doesn't replace what you sweat out: sodium, potassium, magnesium. That's the gap electrolyte mixes exist to close, and it's the whole reason UP&RUN Advance exists, zero sugar, dosed for Indian heat, not imported guesswork.
If you're training past the point where water alone holds you up, that's the signal to add electrolytes, not push through and hope.