The correct answer to this open question is the following.
What I would recommend to him is that he has to be very careful to take caffeine pills to enhance his performance.
Caffeine is a substance that also has negative effects on the human body and a true sportsmanship competitor does not have to use this kind of substance.
Caffeine can produce anxiety, muscle breakdown, or the damage of muscle fibbers, rapid heart rate which is something very serious and can increase the risk of a heart attack due to high blood pressure.
So a better tell him to better commit to his preparation before the context instead of taking pills that can hurt him in the long term.
