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Andy’s options for on-the- Andy does not want to When he isn’t cycling, Andy Andy’s bicycle has holders road snacks are: consume more than 250 kcal 500 ml of energy drink likes to solve maths problems which carry up to three bananas, energy bars, an hour on rides of less than contains 190 kcal and costs 1-litre water/drinks bottles energy gels, cheap cereal 5 hours £1.39 bars or energy drinks. A big meal contains A REALLY BIG meal An energy bar contains A pack of energy gel approximately 800 kcal 1 mile = 1.61 km contains approximately 220 kcal, costs £1 and contains 110 kcal, costs £1 1000 kcal weighs 65g and weighs 42g Andy’s cycling jersey has 8 An average adult male A cheap cereal bar contains pockets. Each pocket holds A banana contains who does not do lots 100 kcal, costs 16p and 1 kcal = 4.19 kJ 1 banana, 120 kcal, costs 10p and of physical activity weighs 25g 1 energy bar, weighs about 120g needs 2500 kcal a day 3 energy gels or 2 cheap cereal bars Andy likes to eat a On a ride that takes several big meal before a Andy cycles at 14 mph days, Andy eats three As well as his meals, Andy short training ride. on rides that take Andy is a 20-year-old man REALLY BIG meals a day: can have up to 1000 kcal of The energy for this meal is more than one day in the morning, off-the-road snacks a day if released during his ride after he finishes cycling, he needs to and in the evening The distance from On the road, Andy can stop Andy does not want to Andy drinks about 500 ml of Land’s End to to re-fill his bottles Andy won’t be able to top-up consume more than 350 kcal fluids per hour of cycling John o’ Groats (with water only). He doesn’t with snacks or energy drinks an hour on rides of more is 1407 km want to do this more than while on the road than 5 hours once every two hours Andy doesn’t like to average Andy uses about 100 kJ of Andy cycles at 19 mph Andy doesn’t eat anything more than 7 hours of cycling energy to cycle 1 km A typical short training on rides that take while cycling that he can’t a day on rides that take more (in addition to his normal ride is 2 hours long less than one day carry in his pockets than one day energy use) http://nrich.maths.org/7571 ©University of Cambridge
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