rptrain
Probationary Member
- Joined
- Jun 23, 2002
- Posts
- 199
Here's what NASA has to say about it:
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Caffeine, a stimulant, can be consumed strategically to acutely increase alertness. It is best not to continually have caffeine before, during, and after a flight. Instead, choose the periods when caffeine can be used to combat a specific period of sleepiness (such as 3_5 A.M. or 3_5 P.M.). Avoid using it when you are already alert, such as just after a nap.
Though affected by several variables (e.g., body size, previous food intake), caffeine will usually take 15_30 minutes to take effect and then last for up to 3_4 hours. Therefore, continually consuming caffeine throughout the day could interfere with subsequent sleep. Stop caffeine consumption far enough in advance of a planned bedtime so that it will no longer be active.
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Caffeine, a stimulant, can be consumed strategically to acutely increase alertness. It is best not to continually have caffeine before, during, and after a flight. Instead, choose the periods when caffeine can be used to combat a specific period of sleepiness (such as 3_5 A.M. or 3_5 P.M.). Avoid using it when you are already alert, such as just after a nap.
Though affected by several variables (e.g., body size, previous food intake), caffeine will usually take 15_30 minutes to take effect and then last for up to 3_4 hours. Therefore, continually consuming caffeine throughout the day could interfere with subsequent sleep. Stop caffeine consumption far enough in advance of a planned bedtime so that it will no longer be active.
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