Are athletes, like at olympics and stuff, allowed to take intense dosages of caffeine?

Caffeine is highly effective, i was reading on wikipedia "one particular study of trained runners showed a 44% increase in "race-pace" endurance, as well as a 51% increase in cycling endurance, after a dosage of 9 milligrams of caffeine per kilogram of body weight.[35] The extensive boost shown in the runners is not an isolated case; additional studies have reported similar effects. Another study found 5.5 milligrams of caffeine per kilogram of body mass resulted in subjects cycling 29% longer during high intensity circuits.[36]"

Answers:

What is this new Olympic event skeleton? I hear it involves a sled. I love sleds.?

I don't know about cycling.

However, in track and field, one can test positive for caffeine. You have to take an awful lot for it to be illegal, though.

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