Zym Endurance is described as a ‘portable electrolyte drink’. The pocket-sized tube contains 10 tablets, each when dissolved in rougly 1/2 litre water providing a refreshing and easy source of essential vitamins and minerals lost during exercise. And the tube’s compact dimensions enable easy stashing for whenever you might need a boost.

Instead of handling messy powders or lugging around bottles of sports drinks, Zym packs all you need except water itself for proper hydration in the palm of your hand.

Available in Lemon and Lime flavour, one tube will cost you £4.95. We’ll be getting some on test soon. Zym will be available from next week through the Edinburgh Bicycle Co-op, Chain Reaction Cycles and Tri & Run, as well as online at www.gozym.com for more info.