I'm not sure if people use (or should use) these outside of training for an endurance event. These are *not your regular jelly beans!* I only heard of these while I was in a training group for a marathon. The benefit of training with a running group for long races is that they usually provide a variety of energy supplements, or "food" as some coaches call it, for the long runs. The idea is that you're supposed to try different kinds while you are training so you know what you like and what you don't like. A lot of people also have digestive problems with certain products, which you want to minimize on race day!! I like these because they were the best on my stomach and you can buy them in tiny ziplock pouches and they're easy to pop in your mouth one or two at a time without stopping to walk. They're also easier to get un-stuck from your teeth! Some of the "gu"s and "blocks" also don't taste as good as these. They also come in caffeinated or regular if you want an added boost!