Hi Gunga Din,   Sounds like you've had some rocky years. Great job preserving! Yes, it's very important to eat breakfast everyday and eat a snack/meal every 3-4 hours to keep your metabolism high (the rate you burn calories throughout the day). I recommend you do not get too wrapped up in timing of meals versus activity.   I encourage you to grab a small snack prior to your walk in the morning. Simply a slice of toast with peanut butter works. Once your walk is complete have another small snack/breakfast. I recommend this because your glucose and glycogen stores are depleted in the morning and you'll get the greatest benefit from your walk if you "fuel" your body before hand.   You may be interested in this article regarding heart disease and breakfast - www.healthcentral.com/heart-disease/c/45112/38215/breakfast.   Otherwise, planning your walk for the morning is a smart decision. Individuals that get their activity "out of the way" in the morning are more likely to stick with a fitness plan. As far as eating followed by an immediate walk, you should not have any side effects. If you do, modify your plan to give yourself 10-15 minutes between breakfast and your walk to see if that eliminates symptoms. Always consult your MD before beginning a fitness regime.   All the best,   Lisa Nelson, RDLose Weight the Healthy Way