Intact Endurance, £19.95James says: Intact Endurance certainly packs a little punch. The 59ml bottle contains four key electrolytes that are lost through exercise – magnesium, chloride, sodium and potassium. Because you only need to add a few drops
of James Cracknell doing the Marathon des Sables, throwing up, cramping and looking like he came within an inch of his life my first thought was – I wonder if I could do that?!In February I will attempt my first ever ultra marathon, a 34 mile multiterrain
