Science

Built on Science. Proven by Performance.

Every ingredient has a purpose. Every formulation starts with science.

The Science of Endurance Nutrition

Every ingredient has a purpose. Every formulation starts with science.

At Eltane, we don't formulate products around trends or marketing claims. We build them around human physiology, how the body produces energy, absorbs nutrients, loses fluids, and performs under prolonged physical stress.

Every carbohydrate ratio, electrolyte level, ingredient selection and flavour profile has been chosen with one objective: to help endurance athletes perform consistently when it matters most.

Whether you're preparing for your first 10K or your next Ironman, understanding the science behind your nutrition allows you to make better decisions, train harder, and recover smarter.

Carbohydrates

Carbohydrates are your body's preferred source of fuel during moderate to high-intensity exercise. They are stored primarily as muscle glycogen and liver glycogen before being converted into glucose to produce energy.

As exercise duration increases, glycogen stores gradually become depleted. Once these stores begin to run low, performance typically declines, perceived effort increases, and fatigue develops rapidly.

Replacing carbohydrates during exercise helps maintain energy availability, preserve glycogen stores, and sustain performance over longer durations.

Hydration

Water is essential for nearly every physiological process involved in endurance performance.

During exercise, sweat is produced to regulate body temperature. Along with water, valuable electrolytes are also lost.

Even relatively small levels of dehydration can increase cardiovascular strain, elevate body temperature, reduce power output, and impair cognitive function. Maintaining hydration throughout exercise supports performance, thermoregulation and recovery.

Electrolytes

Electrolytes are minerals that carry electrical charges within the body. They regulate fluid balance, nerve signalling and muscle contraction.

Sweating results in the loss of electrolytes, particularly sodium, which must be replaced during prolonged exercise.

An effective hydration strategy combines both fluids and electrolytes to support normal physiological function throughout training and racing.

Muscle Glycogen

Muscle glycogen is the body's primary stored form of carbohydrate.

Although it represents the body's most important fuel reserve for endurance exercise, glycogen stores are limited. Once depleted, athletes commonly experience a significant reduction in pace, power output and mental focus, often referred to as "hitting the wall".

Consuming carbohydrates during exercise helps slow glycogen depletion and provides an additional source of energy for working muscles.

Fatigue

Fatigue during endurance exercise is influenced by multiple physiological factors.

As carbohydrate availability decreases, hydration declines and electrolyte losses accumulate, the body's ability to maintain exercise intensity begins to diminish.

Appropriate nutrition does not eliminate fatigue, but it helps delay its onset, allowing athletes to sustain performance for longer and recover more effectively afterwards.