Isotonic means “the same strength.”

 

It’s used to describe special drinks that have the same amount of water, sugar, and salt as your body does.

 

So when you sweat a lot playing football or running around, an isotonic drink helps replace the water and energy you’ve lost, quickly and easily.

 

When you’re out there putting in the hard work, whether it’s on a long run, an intense bike ride, or any endurance activity, your body needs more than just hydration – it needs energy. That’s where SiS GO Isotonic Energy Gel comes in.

 

This gel provides 22g of carbohydrates per serving, which gives you a quick energy boost without the need for extra water. It’s isotonic, meaning it’s designed to be absorbed quickly, so you don’t feel bloated or sluggish.

 

The best part about these gels is the convenience. You don’t have to mess around with bottles or complicated preparations. You just grab one, rip it open, and go. You’re not slowing down or taking a break to drink – you can fuel up on the move, so you stay on track, whether you’re racing or training.

 

Who it’s for:

 

This gel is perfect when you’re on the move – cycling, running, triathlon training – and don’t want to juggle water. If you’re racing or training hard, GO makes fuelling convenient and comfortable.

 

What it does:

 

Delivers 22g rapid carbs in an isotonic format that requires no water to swallow. Light, easy to digest, and avoids bloating – fuel that gets into your system fast.

 

How I’d use it:

 

Pop one every 20–30 minutes during longer sessions. Since it’s isotonic, no need to chase with water – though hydration remains important. Ideal for quick bouts of energy mid-session without gut distress.

 

 

 

The Science:

 

Carbohydrate-Gel Supplementation and Endurance Performance During Intermittent High-Intensity Shuttle Running

 

Study: Football players performed simulated match-play and time trials under two conditions: isotonic gel (SiS GO equivalent) vs. water placebo. Used acute carbohydrate dosing at 43g CHO/hour.

 

International Journal of Sport Nutrition and Exercise Metabolism (Patterson & Gray) (2017)

 

https://www.researchgate.net/publication/5801981_Carbohydrate-Gel_Supplementation_and_Endurance_Performance_during_Intermittent_High-Intensity_Shuttle_Running

 

Isotonic gel intake increased run-to-exhaustion time by 45% vs placebo and maintained higher blood glucose with smaller blood volume drops – demonstrating how isotonic gels support endurance and hydration under load.

 

 

 

One of the Only Truly Isotonic Gels Means Better GI & Fuel Delivery

 

Study: An analytical survey of 51 energy gel variants across 23 brands found only one gel – SiS GO – falls within the isotonic osmolality range (270–330 mmol/kg). Most gels were up to 15× more concentrated, which can impair gastric emptying and cause gut distress.

 

International Journal of Sport Nutrition & Exercise Metabolism (Zhang et al., 2015)

 

https://pubmed.ncbi.nlm.nih.gov/25997181/

 

Being truly isotonic, SiS GO supports faster fluid delivery and carbohydrate uptake without extra water – unlike hypertonic gels, it’s gentler on digestion and more reliable under exertion.