Starting a race well hydrated is one of the easiest performance gains available. Drinking a stronger electrolyte drink in the hours before you start helps your body absorb and hold onto more fluid than plain water does.

Why starting hydrated matters

Many athletes begin races already slightly dehydrated, thanks to travel, nerves, early alarms and hot conditions. Every percent of fluid you're down at the start is a percent you'll struggle to make up while racing, especially when it's hard to drink on the move.

Why plain water isn't enough

Drinking lots of plain water before a race often just sends you to the toilet. Without enough sodium, your kidneys flush the excess fluid out. Adding sodium increases fluid retention, boosting blood plasma volume so you start with a bigger reserve.

A simple pre-loading protocol

  1. The evening before: drink 500 ml of a strong electrolyte drink (around 1,000–1,500 mg sodium per litre) with dinner.
  2. Race morning: drink another 500 ml about 90 minutes before the start, finishing at least 45 minutes before the gun.
  3. Sip to thirst after that, and use the toilet before you line up.

The timing gives your body time to absorb the fluid and get rid of any excess before you start.

When to pre-load

Pre-loading is most useful when:

  • The event lasts more than 90 minutes.
  • Conditions are hot or humid.
  • You're a heavy or salty sweater.
  • Drinking during the event will be difficult (swims, technical trails, fast road races).

For shorter or cooler sessions, normal hydration habits are usually enough.

Try it in training first

Never try anything new on race day. Test your pre-loading routine before a few key training sessions to make sure it sits well in your stomach and fits your morning schedule. Some athletes notice they feel a little heavier at first; that's the extra fluid doing its job.

Cautions

If you have high blood pressure, kidney issues or follow a sodium-restricted diet, check with your doctor before using high-sodium drinks.

The takeaway

A little planning the night before and morning of your race can help you start with full fluid reserves. Endura Fuel high-strength product is designed for exactly this kind of pre-loading.

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