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.

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.
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16 Products

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  1. go-isotonic-energy-gels-30-pack
    GO Isotonic Energy Gel
    9 Flavours
    From £6.30
    Save 40% - 61%
    From £10.50
  2. GO Energy + Caffeine Gels
    GO Energy + Caffeine Gels
    1 Flavours
    From £6.60
    Save 40% - 50%
    From £13.20
  3. GO Energy Bar Mini - 30 Pack
    GO Energy Bar Mini - 30 Pack
    2 Flavours
    From £23.40
    Save 40%
    From £39.00
  4. Speciality Mixed Gel Bundle - 30 Pack (Multi Flavour)
    Speciality Mixed Gel Bundle - 30 Pack (Multi Flavour)
    £36.00 Was £60.00
    Save 40%
  5. SiS GO Isotonic Gel - Multi Flavour 30 Pack Bundle
    GO Isotonic Energy Gel - Multi Flavour 30 Pack Bundle
    £28.80 Was £48.00
    Save 40%
  6. SIS Mixed Isotonic 20 Gel Pack
    Mixed GO Isotonic Energy Gels - 20 Pack
    Save 40%
    Special Price £20.40 Was £34.00
  7. GO Energy + Electrolyte Gels
    GO Energy + Electrolyte Gels
    1 Flavours
    From £7.56
    Save 40% - 50%
    From £12.60
  8. Hydro Tablets
    Hydro Tablets
    11 Flavours
    From £4.80
    Save 40%
    From £8.00
  9. SiS GO Isotonic Gel 60ml 6 Pack Orange
    GO Isotonic Energy Gel Orange 6 Pack
    Save 40%
    Special Price £6.30 Was £10.50
  10. GO Electrolyte Powder
    GO Electrolyte Powder
    3 Flavours
    From £7.20
    Save 40%
    From £12.00
  11. SiS GO Hydro 20 Tablets Berry
    GO Hydro (Berry)
    Save 40%
    Special Price £4.80 Was £8.00
  12. SiS GO Isotonic Gel 60ml 6 Pack Lemon & Lime
    GO Isotonic Energy Gel - 6 Pack (Lemon & Lime)
    Save 40%
    Special Price £6.30 Was £10.50
  13. SiS GO Hydro Pineapple & Mango - 8 Pack
    SiS GO Hydro Pineapple & Mango - 8 Pack
    Save 40%
    Special Price £36.00 Was £60.00
  14. SiS GO Energy Bar Mini 40g 30 Pack Banana Fudge
    GO Energy Bar Mini Banana Fudge - 30 Pack
    Save 40%
    Special Price £23.40 Was £39.00
  15. SiS GO Isotonic Gel 60ml 30 Pack Pineapple
    GO Isotonic Energy Gel Pineapple 30 Pack
    Save 40%
    Special Price £22.19 Was £36.99
  16. SiS GO Energy + Caffeine Gel 60ml 6 Pack Cola
    GO Energy + Caffeine Gel Cola - 6 Pack
    Save 50%
    Special Price £6.60 Was £13.20