/u/[deleted]'s posts in /r/askscience
Why does caffeine cause jitteriness in some people? From what I understand, caffeine doesn't "wake you up", it just affects the binding of adenosine thereby -Preventing- sleepiness.
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I always see weight loss ads claiming that you can lose 10 pounds a week without exercise, although by calculating caloric intake vs output, it doesn't seem possible. What is the maximum amount of weight you can lose in a week?
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Conventionally, the opinion on study seems to be to study for 45 minutes, take a break for 15 minutes, and repeat. Is there any proof to back this division up, compared to say, several hours of study in a row? Has anyone ever done a critical analysis?
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