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Science in Sport

Science in Sport (SiS) believe that the most sophisticated piece of sports equipment you’ll ever own is your body. If you don’t put high performance sports nutrition in, you won’t get your full potential out.

Their range of products are researched and developed by sports scientists in conjunction with international athletes. This scientific research underpins everything we do to ensure that all our products meet the exacting standards of Informed Sport. This means that everything we do and every personal best you achieve with us, is FUELLED BY SCIENCE.

Isotonic Energy Gel
Beta Fuel Energy Drink
FREQUENTLY ASKED QUESTIONS Why use Science in Sport?

WHEN SHOULD I USE SIS GO ELECTROLYTE RATHER THAN SIS GO HYDRO?

Fluid is best absorbed when delivered as part of a carbohydrate-electrolyte drink, so SiS GO Electrolyte is the primary option for hydration and energy in events longer than 90 minutes.

WHEN SHOULD I USE SIS REGO RAPID RECOVERY VERSUS SIS WHEY PROTEIN?

The main difference between the two products is the carbohydrate content. SiS REGO Rapid Recovery has 25g of carbohydrate and 20g of protein per serving. It is best to use it for after training sessions which have significantly depleted your glycogen stores, such as long endurance or high intensity sessions.

SiS Whey Protein contains 23g protein per serving, with less than 2g each of carbohydrate or fat per serving. This makes it a convenient source of high quality protein with very little else, ideal for supporting your lean muscle mass.

ARE SIS GO ISOTONIC ENERGY GELS DESIGNED TO REPLACE ISOTONIC DRINKS?

No, they were designed to make it easy for an athlete to take an energy boost that is convenient during exercise and light on the stomach. More concentrated gels, particularly those which contain simple sugars such as glucose and fructose are more likely to cause gastric distress. No additional water is needed to help the absorption of SiS GO Isotonic gels, but you should still drink to remain hydrated during your activity.

  • SiS Bars / Food Strawberry GO Energy Bakes XMiles
    SiS Bars / Food GO Energy Bakes XMiles
    Offer
    SiS

    GO Energy Bake

    From £2.00 - £18.90 GBP

    The revolutionary GO Energy Bake is poised to redefine the energy bar landscape with its groundbreaking design and scientific formulation. Unlike ...

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  • SiS Gels Orange Beta Fuel Gel XMiles
    SiS Gels Beta Fuel Gel XMiles
    Offer
    SiS

    Beta Fuel Gel

    From £2.20 - £62.70 GBP

    Introducing the Beta Fuel Dual Source Energy Gel, a groundbreaking addition to our world-leading fuelling solution range. Engineered with a revolu...

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  • SiS Electrolyte Drinks Blackcurrant / 500g Tub GO Electrolyte Powder XMiles
    SiS Electrolyte Drinks Blackcurrant SiS GO Electrolyte Powder (1.6kg) XMiles
    Save £1.00
    SiS

    GO Electrolyte Powder

    From Original Price £12.00 - £27.99 GBP
    From £11.00 - £27.99 GBP

    GO Electrolyte Powder is a specially formulated sports drink designed to provide athletes and fitness enthusiasts with the perfect combination of ...

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  • SiS Wellness Box (90 Tablets) Beta Alanine (90 tablets) XMiles
    SiS Wellness Box (90 Tablets) Beta Alanine (90 tablets) XMiles
    Save £1.00
    SiS

    Beta Alanine

    Original Price £14.99
    Current Price £13.99

    Introducing Science in Sport's revolutionary product, 100% Pure Beta Alanine! Designed to assist with your performance during short bouts of high-...

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  • SiS Supplement 80 Serving Tub (400g) / Unflavoured Creatine XMiles
    SiS

    Creatine

    £24.50

    Ideal for successive bursts of short-term, high intensity exercise. High quality version of one of the most commonly used sports supplements. 5g o...

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  • SiS Energy Drink GO Energy Powder 1.6kg XMiles
    Save £1.00
    SiS

    GO Energy Powder

    Original Price £31.00
    Current Price £30.00

    GO Energy Powder is a highly effective and easily digestible carbohydrate supplement that provides a quick supply of energy. This versatile produc...

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  • SiS Trial Pack Beta Fuel Pack Beta Fuel Pack XMiles
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    SiS

    Beta Fuel Pack

    Original Price £59.00
    Current Price £54.95

    Introducing the Beta Fuel Pack from Science in Sport, created by XMiles, specifically tailored to meet the needs of athletes across the spectrum. ...

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