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Unfold a world of endurance

Stories, science and field notes from the OLEUS community — athletes pushing their boundaries, and the science behind their next breakthrough.

Endurance nutrition: the complete guide for runners and triathletes

Endurance nutrition: the complete guide for runners and triathletes

Food before running: timing, carbs, and common mistakes

Food before running: timing, carbs, and common mistakes

Why you feel fatigued after running: causes beyond tired muscles

Why you feel fatigued after running: causes beyond tired muscles

Carb loading before a marathon: what actually works

Carb loading before a marathon: what actually works

Electrolytes for runners: what they do and what they do not solve

Electrolytes for runners: what they do and what they do not solve

Marathon nutrition plan: before, during, and after race day

Marathon nutrition plan: before, during, and after race day

Magnesium for runners: energy, sleep, and muscle function

Magnesium for runners: energy, sleep, and muscle function

Best supplements for runners: what helps and what is hype

Best supplements for runners: what helps and what is hype

Energy gels for runners: what they do and what they do not solve

Energy gels for runners: what they do and what they do not solve

Heavy legs while running: nutrition, recovery, and cellular fatigue

Heavy legs while running: nutrition, recovery, and cellular fatigue

Magnesium rich foods laid out around the OLEUS Daily Shot, essential for Magnesium intake

Why magnesium deficiency is quietly sabotaging your training

How to prime your nervous system before a race

How to prime your nervous system before a race

Trained for months. Why do you feel flat on race morning?

Trained for months. Why do you feel flat on race morning?

Why you are still crashing mid-run even when you eat well

Why you are still crashing mid-run even when you eat well

Marathon-day essentials, including the OLEUS Pre-Activity Shot laid outlaid out

Half marathon vs. full marathon: the nutrition gap most runners do not prepare for

Pre-Activity Shot and ride essentials laid out at dawn, illustrating the endurance-calibrated approach to pre-effort supplementation

Ingredients to look for (and avoid) in a pre-activity supplement

OLEUS Daily Shot beside a whole-food meal with leafy greens, fish, nuts, and fruit on a wooden kitchen table

The micronutrients most endurance athletes are deficient in

What to do in the 60 minutes before a hard training session

What to do in the 60 minutes before a hard training session

Olive leaves and OLEUS Daily Shot bottle on a natural surface, representing plant-based antioxidants for endurance athletes

What plant-based antioxidants do for endurance athletes

Oxidative stress in endurance sport: how it accumulates

Oxidative stress in endurance sport: how it accumulates

How polyphenols support cellular energy and reduce oxidative damage

How polyphenols support cellular energy and reduce oxidative damage

OLEUS Pre-Activity Shot bottle with ingredient label visible showing oleuropein, L-citrulline, acetyl-L-carnitine, and guarana doses

Every ingredient in the OLEUS Pre-Activity Shot, and why it is there

Runner drinking an OLEUS Pre-Activity Shot 30-60 minutes before his intense training

Natural vs synthetic pre-workouts: what the evidence says

The source of the polyphenol oleuropein studied in endurance research, present in. the OLEUS Daily Shot

Olive leaf extract for endurance sport: what the studies show

What mitochondria actually do - and why every endurance athlete should care

What mitochondria actually do - and why every endurance athlete should care

10 European ultra running events you won't want to miss

10 European ultra running events you won't want to miss

OLEUS ORIGINS

What is Oleuropein and why it's included in every daily shot?

What is Oleuropein and why it's included in every daily shot?

OLEUS PERFORMANCE LAB

Inside Volta ao Algarve

Inside Volta ao Algarve

OLEUS FIELD NOTES

Four days in the race: The nasty crash that ended Harrison Wood’s Volta ao Algarve

Four days in the race: The nasty crash that ended Harrison Wood’s Volta ao Algarve

OLEUS ORIGINS

Why Endurance Athletes are Moving Beyond Green Powders

Why Endurance Athletes are Moving Beyond Green Powders

OLEUS PERFORMANCE LAB

16 DAYS ALONE ACROSS A CONTINENT

16 DAYS ALONE ACROSS A CONTINENT

OLEUS FIELD NOTES

Marathon tapering: A Complete Marathon Taper Guide with OLEUS

Marathon tapering: A Complete Marathon Taper Guide with OLEUS

5 Beginner-Friendly Tips to Build Endurance Without Burning Out

5 Beginner-Friendly Tips to Build Endurance Without Burning Out

OLEUS PERFORMANCE LAB

Angelo Vandecasteele: A journey of preparation, performance, and triumph at Hel Van Kasterlee

Angelo Vandecasteele: A journey of preparation, performance, and triumph at Hel Van Kasterlee

OLEUS DIARIES

Scotty Hawker: A Decade of UTMB and the Journey Beyond the Trails

Scotty Hawker: A Decade of UTMB and the Journey Beyond the Trails

OLEUS DIARIES

9 European Ultra Running Events You Don't Want to Miss

9 European Ultra Running Events You Don't Want to Miss

OLEUS ORIGINS

From Runner to Elite Endurance Athlete: Marcos Pascual's 10 Key Tips for Training Like a Pro

From Runner to Elite Endurance Athlete: Marcos Pascual's 10 Key Tips for Training Like a Pro

OLEUS PERFORMANCE LAB

Road Trip Recap with OLEUS: A Behind-the-Scenes Look from Our Marketing Lead, Babs.

Road Trip Recap with OLEUS: A Behind-the-Scenes Look from Our Marketing Lead, Babs.

10 cycling events in Europe this summer you cannot miss (2024)

10 cycling events in Europe this summer you cannot miss (2024)

OLEUS ORIGINS

How to eat during an ultra-trail? By Nicolas Dayez

How to eat during an ultra-trail? By Nicolas Dayez

OLEUS PERFORMANCE LAB

How OLEUS Helps You Beat Energy Depletion and Boost Endurance

How OLEUS Helps You Beat Energy Depletion and Boost Endurance

OLEUS PERFORMANCE LAB

The Science of Endurance and How to Harness It

The Science of Endurance and How to Harness It

OLEUS PERFORMANCE LAB

Beating Your Best: our very own Nicolas Cap takes on La Doyenne

Beating Your Best: our very own Nicolas Cap takes on La Doyenne

OLEUS FIELD NOTES

Jef Van Meirhaeghe's pro supplement guide for pre, mid, and post-training success

Jef Van Meirhaeghe's pro supplement guide for pre, mid, and post-training success

OLEUS PERFORMANCE LAB

Alpe D'Huez Triathlon L

Alpe D'Huez Triathlon L

OLEUS ORIGINS

Zalaris Norseman Xtreme

Zalaris Norseman Xtreme

OLEUS ORIGINS

Ultra-Trail du Mont-Blanc

Ultra-Trail du Mont-Blanc

OLEUS ORIGINS

TOR330 - Tor des Géants

TOR330 - Tor des Géants

OLEUS ORIGINS

DISCLAIMER

¹Carbohydrate-electrolyte solutions contribute to the maintenance of endurance performance during prolonged endurance exercise.

²L-Carnitine helps to maintain energy levels for prolonged periods during intense competition/exercise. Enhances endurance and helps to maintain peak effort during times of high physical demand. L-carnitine makes energy metabolism more effective and protects cell energy metabolism.

³Magnesium contributes to normal muscle function, contributes to a reduction of tiredness and fatigue, and electrolyte balance.

⁴Vitamin C is necessary to maintain energy and general vitality and contributes to the reduction of tiredness and fatigue. Vitamin C is a cofactor in the synthesis of carnitine, which plays a role in energy production in the mitochondria. Vitamin C contributes to the protection of cells from oxidative stress, and to maintain the normal function of the immune system during and after intense physical exercise.

⁵Ginseng supports physical and mental health/recovery, and cognitive and mental performance.

⁶Whey protein provides fast delivery of muscle-building amino acids after training to aid recovery and support muscle growth.

⁷Calcium contributes to the normal functioning of cells.

⁸BCAAs support the improvement of muscle fatigue recovery after exercise.

⁹Acerola is a major dietary source of antioxidants. Contributes to the protection against free radicals which cause cell damage, and the protection of cells and tissues from oxidative damage.

¹⁰Sodium phosphate supplementation increases maximum oxygen uptake in endurance athletes.

¹¹Citrulline-malate supports the maintenance of ATP levels through the reduction of lactates in excess for improved recovery from muscle fatigue.

¹²Vitamin D contributes to the maintenance of normal muscle and immune function.

¹³Guaran is a source of energy / helps to make you feel more energetic and suppresses fatigue.

¹⁴Olive leaf extract (Oleuropein) titrated in Oleuropein has antioxidant activity.

¹⁵Vitamin B12 contributes to the reduction of tiredness and fatigue.

¹⁶Vitamin C & B6 and Magnesium contribute to a normal energy-yielding metabolism.

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