Pre and post workout meals, shakes and bars are increasingly available. Sales of functional nutrition bars alone have increased by almost 400% since 2010. While overall calorie intake and macronutrient split have the biggest impact on body shape and performance, what we eat before training (pre-workout nutrition) and what we eat after (post-workout nutrition) can have an impact on our training session and our overall progress. So what should we eat before and after a training