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Physical Education - Ergogenic aids - illegal: caffeine

Caffeine

Click here to view video about the effects of caffeine.

The athlete benefits from an increase in free fatty acids. This increases
endurance [1] capacity by saving glycogen [2] stores, as it enables more
fats to be used as fuel thereby reducing and postponing muscle fatigue.

There is also increase in muscle/cell membrane permeability to Ca2+ ions,
increasing muscle contractility. Reaction time [3] and strength are
improved. It has been suggested that performance time in a marathon (normal
time two and a half hours) may be decreased by as much as 10 minutes with
the ingestion of caffeine before and during the event. (Costill 1978)

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Links:
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[1] http://alison.com/#
[2] http://alison.com/#
[3] http://alison.com/#