Efficiency is the key to endurance sport performance…
It is about the trade off between your pace and the energy cost required to produce that pace.
Your best way to improve this is by being able to go faster at lower effort / heart rate / power.
There are technical and aerodynamic improvements you can make too, of course, but the key is building your aerobic efficiency.
Simple example: focus less on the ability to run 1km very fast and instead work out how you can run 10km relatively quickly but at very low ‘cost’…
If you want to find out more, enquire within!