Today is all about stamina. It’s a long stage of around 33 km and you climb well over 900 metres, while the descent is quite a bit smaller. You’ll feel it most in the second half.
So break the day up into sections: a first stretch to get going, a proper break, then the long afternoon. You don’t need to rush, but you do need a steady rhythm. Eat on time and let the kilometres come. At the end you’ll walk into Espinosa de los Monteros and check in at the public albergue. Rucksack off, boots off.