The ESC Blog

Your go-to guide for staying healthy, living well and exercising smarter. These days it's not just about a trip to the gym, it's about maintaining a healthy lifestyle that your body and mind will thank you for. Inspiring you to fulfil your potential and make every second count.


3 superfoods to help you become a better runner

Ultra-runner & Tribe Co-Founder, Rob Martineau, on three natural ingredients that should be part of every athlete’s diet.


The purple root, which grows abundantly in the UK, is a nutrient powerhouse. A series of recent studies have shown eating it regularly can help improve speed and stamina.

Its secret lies in compounds called nitrates, in which beetroot is rich. Once in our bodies we convert nitrates to nitric oxide, a gas that widens our blood vessels. Opening up the vessels improves the circulation of oxygen to our muscles, enabling them to work more efficiently. A study on time-trial cyclists published by scientists from Exeter University in 2010 suggests regular beetroot consumption can improve stamina by over 10%.

Beyond, beetroot is loaded with B-vitamins, magnesium and iron, all of which are critical for energy metabolism.


Teff, a staple of the Ethiopian diet, is often held up as the secret behind the African nation’s incredible marathon running success.

Some of the greatest endurance athletes that ever lived – notably former marathon world record holder Haile Gebrselassie, and Abebe Bikila (who won the 1960 Olympic Marathon in Rome barefoot) – were brought up on teff and credited it as a key factor behind their evolution into world-beating runners.

The grain is higher in protein and resistant starches than most grains, making it an ideal slow-release energy source. It is also loaded with calcium and iron, and for coeliacs is gluten-free.

It’s increasingly available in health food stores and you can substitute it for quinoa in most recipes, or use teff flour for baking.

Sour Cherry

Like many red and purple berries, sour cherries are rich in antioxidants. These compounds help the body fend off damage to cells which can be brought on by intensive training.

Sour cherries are particularly high in a group of antioxidants called anthnocyanins. Studies carried out over the past ten years have begun to show that regularly eating foods that are high in anthnocyanins can help athletes perform better, by reducing the impact of muscle damage during intense exercise, and assisting with recovery post workout. Of all the natural foods high in these molecules, sour cherries are the most effective.

Give them a try in juice or dried fruit format.

Rob Martineau is co-founder of TRIBE (, the natural sports nutrition brand and running community. Tom, Guy and Rob, three ultra-runners, founded the brand in 2015 following a 1000 mile run across Eastern Europe. They use natural ingredients that have fuelled athletes for thousands of years, blended in the right way to provide key nutrients pre and post workout.

You can try a TRIBE Pack – a mix of six TRIBE nutrition products tailored to your training – for £1 with code ESC @ 

Sizing Guide


UK 6 8 10 12 14 16
USA 2 4 6 8 10 12
France 34 36 38 40 42 44
Denmark 32 34 36 38 40 42
Italy 38 40 42 44 46 48
Body Measures
cm in cm in cm in cm in cm in cm in
To Fit Bust 80 31 85 33 90 35 95 37 100 39 105 41
To Fit Waist 60 23 65 25 70 27 75 29 80 31 85 33
To Fit Hip 85 33 90 35 95 37 100 39 105 41 110 43
To Fit Inside Leg Regular 79 31 79 31 79 31 79 31 79 31 79 31
UK 4-6 6.5-8.5
EUR 37-39 39.5-42.5
USA 6.5-8.5 9-11
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