SiS-Science in Sport

Our official partnership with the world’s number ONE premium performance nutrition company.

SiS, founded in 1992, has a core range comprising gels, powders and bars focused on energy, hydration, and recovery. SiS is a performance nutrition partner to over 320+ professional teams, organisations, and national teams worldwide. SiS supplies more than 150 professional football clubs in the UK, Europe, and the USA. Brand ambassadors include the former track cyclist Sir Chris Hoy, an eleven-time world champion and six-time Olympic champion, and Eilish McColgan, who won gold in the 2022 Commonwealth Games 10,000 metres. No other performance nutrition brand works with the depth or breadth of elite partners as Science in Sport.

Click here to discover more about SiS’ products

SiS Elite Partners

Science in Sport provide nutritional support to all the Limitless Trails runners. We offer a wide variety of pre-, during- and post-race nutrition needs at all our events, provided by all the SiS performance products.

The Limitless Trails and Science in Sports Ambassadors

Let us introduce you to our inspiring Ambassador team - (clockwise from top left Rebecca Hormann, Ioana Barbu, Stephen Dalton, Ursula Sullivan).
They all have impressive ultra running experience, with some great wins in the last year.
Each Ambassador has an amazing 2025 event diary lined up, including more Limitless events, and we look forward to following their progress and hearing about their experiences on their SM channels, as they support both Limitless Trails and SiS, and provide their unique insights into trail running.
Instagram Links: Rebecca // Ioana // Stephen // Ursula