With all of the marketing of sports drinks, bars, gels and powders, this is an excellent question to ask. There’s certainly no harm in eating — and it might help you meet your fitness goals by giving you more energy during the actual run or elliptical workout.
When it comes to working out what you eat, when, and how much, can all have an effect on how efficient your exercising is. Fueling your body properly for your next round of physical activity can be a science and this video and article are intended to help clear up some of the questions you have and give you a general understanding of why. Now keep in mind while reading this that our suggestions are based on what would work best for the largest population of typical exercisers. If you are a competitive athlete or have special dietary issues then you might not fall into the population that this is meant for.