Marathon training in India is not just about mileage. It is about managing heat, humidity and sweat loss that can derail your race build up faster than a missed long run.
I have been running in Delhi heat for several years and have tested Fast&Up Reload, Enerzal, Gatorade and ORS across long runs from 18 km to 32 km. Here is what actually works — and what does not.
My Testing Experience
Fast&Up Reload — My go-to for anything above 18 km. Two tablets in 500 ml water before the long run. No stomach issues even on hot Delhi mornings. Orange flavour works well even in warm water, which matters in April heat.
Enerzal — Used this in my early running days. Affordable and available at every pharmacy. The sugar hit is noticeable — fine for a 10K but too sweet for anything above two hours. My stomach started protesting on runs above 25 km.
ORS (Electral) — I use this post-run for recovery rather than during runs. Designed for illness, not sustained exercise. Works in a pinch but not built for endurance performance.
Gatorade — Convenient when travelling to races. Lower sodium than dedicated sports electrolytes. Fine for a half marathon, not enough for a full marathon in Indian conditions.
My verdict: For Indian heat and marathon training, Fast&Up Reload is the most practical everyday choice. Unived Elite is worth it if you are logging 60 km+ per week.
Why Electrolytes Matter for Indian Runners
During runs above 90 minutes, you lose significant sodium through sweat. Without replacing it, fatigue sets in early, cramps increase and recovery slows.
Sports medicine research confirms endurance athletes lose 500 to 1000 mg sodium per hour depending on sweat rate. In Indian summer training conditions, losses can be even higher.
If you are training for a full or half marathon or doing long runs above 20 km, electrolyte replacement is not optional.
How Much Sodium Do You Need?
- 300 to 600 mg sodium per hour during long runs
- 400 to 800 ml fluid per hour depending on sweat rate
- More if you see white salt stains on your clothes after runs
Never try a new hydration strategy on race day. Test everything in training.
Quick Comparison Table
Prices based on Amazon India listings as of April 2026. Check current price before buying.
Prices indicative based on Amazon India listings. Check current price before buying.
Product Reviews
1. Fast&Up Reload — Best Overall for Indian Runners Best for: Long runs 15 km and above Price: ~₹265 for 20 tablets (~₹13 per serving) Sodium: ~300 mg per tablet
The most widely used electrolyte supplement among Indian endurance runners. Effervescent tablet format dissolves quickly even in warm water. Informed Choice certified — important for competitive runners.
What works: Solid sodium level, includes potassium and magnesium, easy to carry in a running belt. Watch out for: Contains glucose — factor this in if you are already using gels.
Check latest price on Amazon India
2. Unived Elite Hydration Mix — Best for Serious Marathon Training Best for: Full marathon and ultra training blocks Price: ~₹600–700 for 16 servings (~₹40 per serving) Sodium: High, endurance-focused formulation
Co-developed with elite endurance runners. Low carb, no gut stress, designed for 90+ minute efforts. If you are logging serious weekly mileage, this is the most performance-focused Indian option available.
What works: Higher sodium density, no fillers, suitable for runners doing 60 to 80 km per week. Watch out for: Premium pricing. Milder taste than sweeter options.
Check latest price on Amazon India
3. Enerzal — Best Budget Pick Best for: Runs under 90 minutes, beginners Price: ~₹100–130 per pack (~₹10–15 per serving) Sodium: Moderate | Sugar: High
Available at pharmacies across India. Its affordability makes it a popular starting point. The sugar content makes it less suitable for long efforts but useful for shorter runs or post-run recovery.
What works: Widely available, affordable, convenient sachet format. Watch out for: High sugar — not ideal for runs above two hours combined with gels.
Check latest price on Amazon India
4. Carbamide Forte — Best for High Mileage Training Best for: Runners doing 5+ sessions per week Price: ~₹450 for 40 tablets (~₹11 per serving) Sodium: Competitive | Sugar: Zero added
If you are going through electrolyte supplements multiple days a week, Carbamide Forte offers the best cost-per-serving ratio of any tested option. Zero added sugar is a bonus for runners combining with carbohydrate gels.
What works: Excellent value, zero sugar, easy to customise dosage. Watch out for: Not a pure endurance brand. Taste varies between flavours.
Check latest price on Amazon India
Electrolytes vs ORS: Not the Same Thing
ORS like Electral is designed for illness recovery — higher sugar ratios suited for medical dehydration, not sweat replacement during sustained exercise.
Sports electrolyte powders have a different sodium-to-sugar ratio matched to what your body needs mid-run.
Use ORS post-run if that is all you have. But do not use it as your in-run hydration strategy.
When to Take Electrolytes
- Under 60 minutes: Water is enough
- 60 to 90 minutes: Electrolytes if running in heat above 28°C
- 90 minutes and above: Electrolytes essential
- Above 2 hours: Combine electrolytes with carbohydrates
Watch for cramping, energy dips, excessive thirst and post-run headache — signs your sodium intake needs adjusting.
Common Mistakes Indian Runners Make
- Drinking only water during long runs
- Trying a new product for the first time on race day
- Ignoring white salt stains on clothes as a warning sign
- Over-diluting the electrolyte mix to save cost
- Relying on Gatorade alone for a full marathon
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Frequently Asked Questions (FAQs)
or most Indian runners, Fast&Up Reload offers the best balance of sodium content, convenience and availability. If you are training for a full marathon or ultra, Unived Elite is worth the higher price.
ORS like Electral can work in an emergency but it is formulated for illness recovery, not sustained exercise. The sugar-to-sodium ratio is different from what your body needs during a long run. Use a sports-specific electrolyte whenever possible.
Aim for 300 to 600 mg sodium per hour. For most products this means one serving every 45 to 60 minutes during efforts above 90 minutes. Adjust based on your sweat rate — if you see salt stains on your clothes, you are a heavy sweater and need more.
Gatorade has lower sodium than endurance-specific products. It works for half marathons and shorter efforts. For a full marathon in Indian heat, pair it with salt capsules or switch to a higher sodium product like Fast&Up Reload.
Start within the first 30 minutes on runs above 90 minutes — do not wait until you feel thirsty or crampy. Thirst is a late signal. Build your hydration habit from the start of the run, not when things go wrong.
Yes, for healthy runners in heavy training. During peak marathon prep when you are running 5 to 6 days per week in Indian heat, daily electrolyte use is reasonable and often necessary.
About the Author
Anurag Rana is the founder of Fat Marathoner, a running and fitness platform built for everyday runners of all shapes and sizes. Based in Delhi, Anurag has been training for and covering marathons across India and the UAE for several years. He writes from personal experience, having tested running gear, nutrition products and race routes in real Indian conditions, not lab settings. Fat Marathoner covers marathon calendars, running shoes, GPS watches and training advice for the Indian running community.
Disclosure: This article contains affiliate links to Amazon India. If you purchase through these links, Fat Marathoner earns a small commission at no extra cost to you. All product opinions are based on personal use and independent research.
