Of late, there are some typical ways my conversations go with people training for their first marathon (or half marathon in some cases). Person 1: Jagan, I am going to attempt a 20k run today as I have registered for a HM in 3 months. Me: Wow, congrats! So what is your nutrition and hydration plan for today? P1: Oh, I have a 1L bottle of water in my bike, will access it every half hour. Me: That's good. What is the nutrition plan? P1: Electrolytes? I have a few Glucose bolts chewable tablets. Hope that should help me sustain. Me: .... Another day, another long run Person 2: Jagan, today is a 30 k run for me as per the CR training plan. Me: Wow. so what was the previous long run? How did it go? P2: We had a 28 k a couple of weeks back, did in nearly 4 hours. I had to take more walk breaks after 2 hours. Weather was not supportive. Me: Oh. How many km did you complete in 2 hours? P2: I started strong, did nearly 17 km in 2 hours! Me: Nice. What did you eat? P2: I had a heavy d...