performance in endurance events. Many people find gels easiest though, and they are a more concentrated source of carbohydrate. Don't worry too much about your fat and protein content – you’ll only be using them for energy during the race.Q. I’m running

runs (or last long run) in training. If you still have concerns, then my advice would be to pace yourself carefully so you don't go off too fast. Otherwise you will really challenge your carbohydrate stores.Q. Are energy products such as chews and gels

Nick Morgan is Lead Sport Scientist at Lucozade Sport.Read the whole forum debateQ. Is there any benefit in doing my long runs without taking on any products? Would they then have an 'extra-bonus' effect on race day? MaracuyaA. There is school