Running; Timing is everything 

No one likes that tired, weighed down feeling after a large meal, so imagine how it would feel if you had to run after such a meal. So it makes sense not to stuff your face just before you run, but there are some general guidelines you can follow to ensure your food is properly digested before you put on your running shoes. As a rule of thumb: 150-200kcal for every hour before running. For large meals – wait 2 to 4 hours before running For light meals – wait 2 hours before running For light snacks – wait 30 minutes to 1 hour before running These are general guidelines. Not everyone digests food at the same rate so it’s a matter of trial and error to find out how long it’s best for you as an individual to wait before you start running. Going the distance What you eat before you run can also largely depend on how long or how far you plan to run.