I just add protein to everything.
Bit before. Loads after.
But surely if you eat protein before a 60min run. It's available for recovery when you finish. Plus. If you do bonk a little. Your body is less likely to cannibalise your thighs.
Not too much though. Don't want to load the digestive system.
Assumption was endurance training. What's the science to adding protein to meals pre-training? Show working.