Moonbear
Staff Emeritus
Science Advisor
Gold Member
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I think just the fact that some of us need to wake up BEFORE we can stomach breakfast indicates that we don't need breakfast to wake up and become alert. It also doesn't take into account the post-prandial (after a meal) sleepiness that decreases alertness. My least productive time of day is the hour after each meal.chroot said:BTW, the naysayers (goaskalice.com, etc.) who claim your brain and central nervous system are deprived of glucose when you don't eat breakfast are, well, stupid. Your liver always stores 2000 kcal or so worth of glucose as glycogen, and releases it as necessary to keep your blood glucose relatively constant. You're not "deprived" of glucose by any means.
The reason people feel more awake and more alert after breakfast is probably caused more by the simple fact that eating breakfast wakes you up. The smells, tastes, and textures are stimuli that activate large parts of the brain. Listening to a high-energy favorite song, taking a shower, or doing some light exercise all have the same effect of waking you up.
- Warren
Sure, if your stomach is growling, you're going to pay more attention to that than other mental tasks at hand, but I don't know many people who would skip breakfast if their stomach was growling when they woke up.
I can somewhat appreciate your dilemma of the difficulty in balancing when to eat relative to exercise in the morning (my preferred solution is to wait until later in the day before engaging in strenuous activity, but that's aside from the point). When I was in high school, I had a year of first period gym class. Ugh! If I ate breakfast, I'd get nauseous from the exercise so soon after. If I skipped breakfast, the morning exertion and calories burned left me feeling VERY hungry for the next few classes until lunch time. Of course, being high school, packing a snack to eat in my second period class was out of the question, although it would have greatly resolved the problem. Already being a bit of a gym-class-hating dork in high school, that just gave me even more reason to hate it. I was so happy for the one quarter where we had health class instead of gym!
When I don't have the option to avoid strenuous activity in the morning (like when I'm out working at the farm first thing in the morning), I've had good luck with nibbling. For example, if someone brings in bagels or doughnuts, or I have a couple cereal bars with me, I'll take a bite, work for a bit, grab another bite when I have a moment, back to work, etc. Mostly, that started simply because I never had enough time to just stop and eat anything in its entirety when I was hungry, but I've found that even when I do have time to stop, it still solves the problem of getting sick to the stomach from eating a whole meal then exerting oneself for an hour or more.
So, in your case, it might work while biking too. Just keep your cereal bars with you, or whatever you want to eat, take a bite, bike a while, take another bite, bike a while. That way, you get the benefit of the energy as your body needs it, but without making your stomach tumble from eating the entire thing at once. One thing that happens with exercise is that your digestion slows a bit as energy is diverted to your muscles, so smaller bites at a time gives your stomach a chance to keep up better.