Picture the scene. You’re 3 miles (4.8km) into your 10 mile (16km) long run in the pouring rain, when you feel an overwhelming compulsion to stop. There’s an ache in your knee, your back suddenly feels sore and more than anything in the world, you just want to stop and walk home. Well the first thing to do is take comfort in the fact that all runners have experienced something similar. When your training gets tough, for whatever reason, it can be a huge mental battle to keep going, but the good news is, you can win it.