Wilkinson (nutricentre.com). Your recommended daily allowance (RDA) for iron is 18 to 20mg; good sources of the mineral include liver, iron-fortified cereal, dried fruit, beef and spinach. Crucial calciumYour RDA for calcium is 1,000 to 1,300mg; good sources
the equivalent of eight large glasses of water every day, and probably twice that in warm weather. It also means taking in about half a pint of fluid every 15-20 minutes of running. For runs of an hour or more, you also need to replenish spent energy stores
