Every set now comes in individual packaging with an on-course fuelling plan! Fast delivery guaranteed! The SiS Half Marathon Nutrition Set is designed for runners aiming to achieve their best over 21 km. It includes products covering three essential needs for the distance: hydration, energy and recovery. What's in the set? Energy Bar : a convenient carbohydrate snack to eat around 30 minutes before the start. SiS GO Isotonic Energy Gel — 1 gel; SiS GO Energy + Electrolyte Gel — 1 gel; SiS GO Energy + Caffeine Gel with 75 mg of caffeine — 1 gel for an energy boost over the final kilometres. Within 30 minutes of finishing, we recommend taking 30 g of SiS REGO Protein Powder to support recovery. Add the powder to a bottle of water and shake well. Free gift: every set includes a wristband showing when to take each gel during the race — 1 wristband. How to fuel for a half marathon On race morning, after breakfast, eat a carbohydrate bar for energy and drink 150–200 ml of SiS GO Electrolyte isotonic drink to top up your electrolytes. Take the first isotonic gel at around kilometre 5–6 and the second at around kilometre 12–13. You do not need to take them with water, but remember to drink at aid stations. Take the caffeine gel at around kilometre 16–17 to help you stay focused and increase your pace towards the finish. After finishing, take SiS Cherry Juice to support recovery. To restore fluid balance, use a Science in Sport electrolyte drink for 3–5 hours after the half marathon. Additional advice Remember that SiS sports nutrition is not a substitute for a balanced, healthy diet. Plan your meals several days before the half marathon and include carbohydrate loading, fruit and vegetables. After finishing, eat foods rich in protein, fibre and vitamins. The plan below shows the recommended sports nutrition before, during and after the race. You can also buy 42 km marathon sets and half-Ironman nutrition packs on our website. 21 km fuelling plan Read more about half marathon nutrition in our blog .

An energy gel is a convenient source of carbohydrate that helps maintain energy levels. SiS GO Isotonic Energy Gel is specifically designed for use during high-intensity exercise. Its formula allows the gel to be absorbed quickly without the need to take it with water. What's in SiS GO Isotonic Energy Gel? Each isotonic carbohydrate gel contains 60 ml and comes in a durable, compact sachet that is easy to open on the move. SiS GO Isotonic Energy Gel provides: 87 kcal; 22 g of carbohydrate; 0.6 g of sugar; 33% maize-derived maltodextrin. Other ingredients include water, gelling agents (gums), natural flavourings and preservatives. This Science in Sport carbohydrate gel is suitable for vegans and vegetarians and contains no soya, lactose, gluten, aspartame, wheat or nuts. How to use this sports energy gel This energy gel for running and endurance sport can help you consume up to 60 g of carbohydrate per hour. Take 1–3 SiS GO Isotonic Energy Gels every 60 minutes during exercise lasting more than 90 minutes. The gels do not need to be taken with water, but maintaining adequate hydration remains important. When training or racing in hot conditions, we recommend taking one SiS GO Energy + Electrolyte Gel per hour alongside your isotonic gels to replenish energy and provide electrolytes.

SiS GO Hydro is a convenient effervescent tablet that dissolves quickly in water. The low-calorie drink contains electrolytes including sodium, potassium and magnesium plus vitamins B1, B2 and B6. Why use an electrolyte drink? Fluid and electrolytes are lost through sweat during exercise. GO Hydro provides a convenient way to add electrolytes to water without a significant carbohydrate intake. What does it taste like? Despite its low sugar content and meaningful sodium level, the flavoured drink is designed to remain easy to drink during exercise. How to use SiS GO Hydro Dissolve one tablet in 500 ml of water. Consume the prepared drink within 24 hours. The source suggests 500 ml three to four hours before competition and a further 250–500 ml one hour before the start. Do not exceed four tablets per day. GO Hydro suits cycling, running and other activities where electrolyte intake is required without substantial carbohydrate. It is suitable for vegans. GO Hydro or GO Electrolyte? GO Hydro provides electrolytes with very little carbohydrate, making it useful when energy intake comes from other products. For longer sessions where carbohydrate is also required, consider SiS GO Electrolyte , which provides 36 g of carbohydrate per serving. Ingredients Citric acid, electrolytes 37% (sodium bicarbonate, sodium chloride, calcium carbonate, potassium chloride, tricalcium phosphate, magnesium carbonate), sorbitol, inulin, colour (beetroot red), natural flavouring, lemongrass powder (2.3%), starch, sweetener (sucralose), vitamins (pyridoxine hydrochloride, riboflavin, thiamine). Per serving Energy — 8.8 kcal; Carbohydrate — 0.8 g; Sugars — 0.1 g; Sodium — 0.3 g; Vitamin B1 — 0.2 mg; Vitamin B2 — 0.3 mg; Vitamin B6 — 0.4 mg; Calcium — 5.11 mmol/L; Magnesium — 0.66 mmol/L; Zinc — 0.04 mmol/L; Potassium — 3.32 mmol/L. Made in the United Kingdom.

SiS Race Number and Energy Gel Belt

Science in Sport Race Belt Lightweight, comfortable and functional, this race belt is ideal for trail runners, marathon runners, duathletes and triathletes carrying a race number and energy gels. Race number attachments — keep your number securely and comfortably in place Six gel loops — keep your energy gels within easy reach Adjustable fit — adapts to different body shapes and sizes Ultralight construction — barely noticeable while running Secure hold — stays in place without restricting movement A practical choice for trail races, marathons, duathlons and triathlons. Your gels close at hand, your race number secure and your focus on the run. View energy gels ➡