I'm just curious what is the time in between your meal and when you begin to play badminton. Do you walk or something after you eat so you digest the food? I usually eat 1 hr - 1 1/2 hrs before playing (Full meal) and like if it is badminton in the early morning I usually grab a bite of a bagel with cream cheese or something. Also, is it bad to drink coffee before playing? I don't know why but it keeps me awake and energized.