For a routine 5k after a carbohydrate-based breakfast, water is a straightforward choice: UK Sports Institute says a sports drink is probably unnecessary in that situation. If you want cordial for flavour, consider whether you tolerate fizz and check the sugar in the prepared drink. A sugar-containing cordial can add some carbohydrate if you have missed food, but it is not a substitute for eating.
If you have had a carbohydrate-based breakfast, you need not choose cordial as run fuel. UK Sports Institute says a sports drink is probably unnecessary in that situation; choose cordial for its flavour if you prefer it to water.
If you want a drink to provide some carbohydrate, compare sugar per prepared serving rather than assuming every cordial does so. A serving of sugar-containing cordial can make a small contribution, not replace pre-run food.
Fizz may matter more than flavour when choosing a pre-run drink. NHS guidance identifies fizzy drinks as a possible contributor to gas and bloating; still water or a cordial diluted with still water avoids the carbonation.
Decide whether you want flavour or a small carbohydrate contribution, then check how the cordial is prepared and whether fizz suits you before a run.
| Priority | What to check | Your needs |
|---|---|---|
| Fuel or flavour | Compare sugars in the drink as diluted, using the serving size shown on the label. Tesco Groceries lists 10 g sugars per 250 ml diluted serving for Robinsons Crushed Lime & Mint; Waitrose & Partners lists 1.1 g per 100 ml, diluted 1:6, for its No Added Sugar Cherries & Berries Cordial. | If I have eaten beforehand, I mainly want a drink I enjoy. If I have missed food, I want to know what a prepared serving actually provides rather than treating cordial as a meal. |
| Comfort with fizz | Decide between sparkling and still water as the mixer. If fizzy drinks tend to cause discomfort, try the prepared drink before an easy training run rather than for the first time before a timed 5k. | I like a sparkling drink, but would choose a still option if carbonation leaves me bloated. NHS guidance identifies fizzy drinks as a possible contributor to gas and bloating. |
| Dilution | Follow the ratio on the exact bottle and compare nutrition on the same prepared-drink basis. Tesco Groceries specifies 1 part concentrate to 6 parts water for Robinsons Crushed Lime & Mint. | I want to prepare the serving I am comparing on the label, rather than make a stronger drink without realising it. |
| Ingredients | Read the current bottle for sweeteners, allergens and its mixing instructions; do not assume flavours within a range have identical labels. | Before choosing a flavour, I need to check its ingredients against anything I avoid and whether its instructions suit the drink I plan to make. |
A carbohydrate drink is not automatically needed for a routine 5k. UK Sports Institute says it is probably unnecessary if you have had a carbohydrate-based breakfast.
Base the decision on whether you have eaten; choose a sugar-containing drink for a deliberate carbohydrate contribution, not simply because you are running.
NHS guidance identifies fizzy drinks as a possible contributor to gas and bloating, which may affect comfort during a run.
Try the prepared drink before an easy training run, or dilute cordial with still water if carbonation does not suit you.
The amount of sugar in a glass depends on how much concentrate and water you use. Nutrition figures for differently diluted servings are not directly comparable.
Use each bottle’s stated ratio and compare sugars for clearly identified prepared serving sizes.
A flavour name does not establish whether a cordial contains sweeteners or an ingredient you need to avoid.
Check the current bottle’s ingredient and allergen information before drinking, particularly if barley or sulphites are a concern.
These label and range examples show what to compare; a figure for one flavour does not describe every cordial from the same brand or retailer.
Tesco Groceries lists Robinsons Crushed Lime & Mint as a concentrate diluted 1 part cordial to 6 parts water.
Marks & Spencer says its cordial range is ready to dilute with still or sparkling water.
Waitrose & Partners lists a no-added-sugar cordial alongside other cordial choices.
This no-added-sugar squash is an option when you want a flavoured drink rather than a substitute for pre-run food. Check its bottle’s mixing instructions before preparing it with sparkling water.
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A no-added-sugar squash for a flavoured drink before a 5k, rather than a replacement for food. Check the current label for dilution instructions and for barley and sulphites if either is a concern. If you plan to use sparkling water, check the bottle’s mixing guidance and try the prepared drink before an easy training run.
No: UK Sports Institute says a sports drink is probably unnecessary if you have had a carbohydrate-based breakfast. Water is a straightforward option; choose cordial for flavour or for a specific, label-checked carbohydrate contribution.
Choose according to what you want the prepared drink to provide. No-added-sugar cordial can provide flavour without being chosen as run fuel; if you want some carbohydrate after missing food, check a sugar-containing cordial’s diluted-serving label. Tesco Groceries lists 10 g sugars per 250 ml diluted serving for Robinsons Crushed Lime & Mint, which is not a replacement for a meal.
Some can: Marks & Spencer explicitly says its cordials are ready to dilute with still or sparkling water. Check the instructions and dilution ratio on the exact bottle you choose rather than assuming every cordial gives the same guidance.
It could if fizzy drinks tend to make you bloated. NHS guidance identifies them as a possible contributor to gas and bloating, so try your prepared drink before an easy training run or choose a still mixer.
Check sugars for the prepared serving, its serving size and dilution ratio, then read the current ingredients and allergen information. Those details help you distinguish a drink chosen for flavour from one that provides some carbohydrate and check whether the particular bottle suits you.