SiS GO Hydro + Caffeine Cola combines electrolytes with 75 mg of caffeine in an easy-dissolving effervescent tablet. The low-carbohydrate drink provides sodium, potassium, calcium and magnesium in a convenient format for training and competition. Benefits Dissolves in water in approximately one minute; Non-carbonated once fully dissolved; Provides electrolytes with minimal carbohydrate; 75 mg of caffeine per serving; Low-calorie drink format; Tested under the Informed Sport programme for banned substances. Nutritional information per serving Fat — less than 0.5 g; Carbohydrate — 0.6 g; Sugars — 0.5 g; Protein — less than 0.5 g; Salt — 0.87 g; Caffeine — 75 mg; Vitamin B1 — 0.2 mg; Vitamin B2 — 0.3 mg; Vitamin B6 — 0.4 mg; Electrolytes — 37%: potassium, calcium, sodium and magnesium. Each tube contains 20 tablets. Directions for use Dissolve one tablet in 500 ml of water. The source suggests 500 ml three to four hours before training and a further 250 ml 30 minutes beforehand. During demanding exercise, use up to 500 ml of prepared drink per hour according to your fluid and sodium needs. Do not exceed four servings per day. Allow the tablet to dissolve fully. Consume within 24 hours of preparation. Contains caffeine. Not recommended for children, pregnant or breastfeeding women, or people sensitive to caffeine. For a carbohydrate-containing option, explore SiS GO Electrolyte Powder 1.6 kg .

A trial set containing two SiS energy gels. Ideal for anyone trying Science in Sport gels for the first time and looking to find out how well the products suit their individual fuelling needs. What's included? SiS GO Isotonic Energy Gel — 1 gel; SiS GO Energy + Caffeine Gel with 75 mg of caffeine — 1 gel. The isotonic gel does not need to be taken with water. The caffeine gel provides 75 mg of caffeine to help support concentration and alertness towards the end of a race or training session. IMPORTANT We do not recommend trying sports nutrition from any brand for the first time on race day. Test every new product during training, ideally during a long session. This will help you understand how your body responds and reduce the risk of unexpected problems during your event.

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 .

Every set now comes in individual packaging with an on-course fuelling plan! Fast delivery guaranteed! The SiS Marathon Nutrition Set brings together fuel for before, during and after a 42 km race. Sports nutrition for a marathon SiS GO Energy Bar — eat after breakfast or approximately one hour before the start for extra carbohydrate. SiS GO Isotonic Energy Gels — use around km 7–8 and km 12–13. They can be consumed on the move without immediately drinking water — 2 gels. SiS GO Energy + Electrolyte Gels — use around km 17–18 and km 22–23 — 2 gels. SiS GO Energy + Caffeine Gels with 75 mg caffeine — use around km 27–28 and km 32–34 — 2 gels. Within 30 minutes after the finish, mix 30 g of SiS REGO Protein Powder with water and shake well. Free gift: a wristband showing the suggested timing for each gel — 1 wristband. How to fuel a 42 km race Your pre-race diet should include familiar sources of simple and complex carbohydrate. On race morning, the source suggests 1.5–3 g of carbohydrate per kilogram of body mass and avoiding unusually high-fibre foods. After finishing, include fruit, vegetables and protein-rich foods. Use aid stations for regular small drinks of water. Plan carbohydrate loading for one or two days before the event. Test every product and the complete timing plan in training. Sports nutrition does not replace a varied, balanced diet. You may also use SiS GO Electrolyte before the race. The source suggests 500 ml after breakfast, approximately 2.5–3 hours before the start, followed by 150–200 ml between 30 and 90 minutes before the race. Adjust fluid intake for your individual sweat rate and conditions. New to long-distance SiS fuelling? Read our running tips .