Im currently training for the Fan Dance race next month and the Paras 10 in March and up untill this point Ive never thought about energy gels etc,always been a good old water man.Im banging out a 10 miler with weight just within P Coy 10 miler timings however I feel totally empty by the end,not a physical wreck but literally empty of fuel to the point of light headed,dizzyness. Does anyone use any of these gels,water additives? Are they worth using? Which ones would people reccomend? I picked up a few today "SIS Isotonic Gel" soley because they were the only ones on the shelf in the shop,however any help on what types to use would be greatly appreciated from a middle aged man who still thinks he is a youngan!!!