Shutterstock/Duncan Andison
Cycling on hilly roads, what is the best option to save energy: go as fast as possible downhill to gain momentum for the next climb, or stop pedalling to have a rest and regain some strength?
Hillary Shaw
Newport, Shropshire, UK
Without air or friction, and if every hill were the same height, a cyclist would need no energy input – downhill speed would just take them up the next hill. Rollercoasters work a bit like this.
But in reality there is friction and air, and the faster you travel, the more energy goes into overcoming these things. So, you should…
