Pre Workout Supplements

Pre Workout Supplements

Ever tried to hit the gym after a long day of work? Or needed a vital hit of energy to help you go the distance? Here at Science in Sport, our expertly formulated pre-workout products have been designed to help you achieve your goals, delivering an energy boost at the moment you need it the most.


Available in a variety of great-tasting flavours, our pre-workout range is packed with protein to aid post-workout recovery and fuelling carbohydrates. To take your workout to the next level, shop SiS pre-workout today.

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16 Products

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  1. GO Isotonic Energy Gel
    GO Isotonic Energy Gel
    24 Flavours

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    From £10.50
    438 Reviews
  2. GO Energy + Caffeine Gels
    GO Energy + Caffeine Gels
    7 Flavours

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    From £13.20
    129 Reviews
  3. GO Energy Bar Mini - 30 Pack
    GO Energy Bar Mini - 30 Pack
    5 Flavours
    From £39.00
    90 Reviews
  4. GO Energy Powder - 1.6kg
    GO Energy Powder - 1.6kg
    2 Flavours
    From £33.00
    42 Reviews
  5. SIS Mixed Isotonic 20 Gel Pack
    Mixed GO Isotonic Energy Gels - 20 Pack
    £32.00
    20 Reviews
  6. GO Energy + Electrolyte Gels
    GO Energy + Electrolyte Gels
    3 Flavours

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    From £57.00
    56 Reviews
  7. Hydro Tablets
    Hydro Tablets
    13 Flavours
    From £8.00
    259 Reviews
  8. GO Electrolyte Powder
    GO Electrolyte Powder
    6 Flavours

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    From £12.00
    110 Reviews
  9. SiS GO Hydro 20 Tablets Berry
    GO Hydro (Berry)
    £8.00
    20 Reviews
  10. SiS GO Hydro Pineapple & Mango - 8 Pack
    SiS GO Hydro Pineapple & Mango - 8 Pack

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    £60.00
    19 Reviews
  11. GO Energy + Electrolyte Gel Salted Caramel - 30 Pack
    GO Energy + Electrolyte Gel Salted Caramel - 30 Pack

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    £57.00
    19 Reviews
  12. SiS GO Electrolyte 1.6kg Tropical
    GO Electrolyte Tropical - 1.6kg

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    £28.99
    20 Reviews
  13. SiS GO Energy Bar Mini 40g 30 Pack Banana Fudge
    GO Energy Bar Mini Banana Fudge - 30 Pack
    £39.00
    20 Reviews
  14. GO Isotonic Energy Gel Orange 15 Pack
    GO Isotonic Energy Gel Orange 15 Pack

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    £24.00
    20 Reviews
  15. SiS GO Isotonic Gel 60ml 30 Pack Pink Grapefruit
    GO Isotonic Energy Gel Pink Grapefruit 30 Pack

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    £42.00
    17 Reviews
16 33 48 View All

16 Products

Pre Exercise

A boost when you need it most

Designed to help power your training sessions, pre-workout can help to reduce your perceived effort and drive you through the toughest moments. From energy gels for a super-fast dose of carbohydrates during exercise, to pre-workout powder ideal for mixing pre-workout drinks, shakes or energy loading, we offer a versatile range of carbohydrate-packed snacks, specially formulated to help you excel.

Power your training sessions

When you lead a busy lifestyle, it can be tricky to give your body the fuel it needs in-between training sessions. For the perfect pre-exercise kick, simply slip an energy bar into your pocket, and you have a quick carbohydrate boost ready to power you through your high-intensity training session. For a high concentration of carbs alongside a nutritious selection of ingredients, our pre-workout snacks are perfect for any diet-conscious athlete.

Train harder and faster for longer

Ahead of any endurance workout or long distance training session, you want a pre-workout supplement that will prepare your body to go harder and faster for longer. At SiS, our selection of pre-workout products also includes Performance Nitrate pre-workout powders, gels, bars and shots, created to improve your muscle efficiency and reduce the oxygen cost of exercise.

Shop SiS pre workout supplements

From energy gels to electrolyte powder and hydro tablets, our wide variety of pre-workout powders and drinks has been expertly formulated to power your training. For a boost of energy when you need it the most, discover the benefits of SiS pre-workout products today.

Looking to build muscle and increase your protein intake? Our wide range of sports nutrition products also includes protein powders and protein bars to help support muscle growth.

Available in a variety of great-tasting flavours, our pre-workout range is packed with protein to aid post-workout recovery and fuelling carbohydrates. To take your workout to the next level, shop SiS pre-workout today.

Premier Delivery Just £9.99 For A Year Of Next Day Delivery!