Caffeine can increase alertness, sharpen focus, improve mood, boost pain tolerance, help burn fat, and help athletes do more work for longer periods in the gym and in sport.
Caffeine was previously banned by the International Olympic Committee (IOC) pre-competition but since January 2004, any restriction on caffeine’s use pre-event has been lifted.
Caffeine works on the central nervous system.
In bodybuilding and sports, many people also use caffeine pills to enhance performance, these are typically 50-200mg each, and doses may be as much as 300-400mg.
Caffeine is rapidly absorbed from the digestive system reaching peak concentration in blood 60-90 minutes after ingestion. Caffeine is then metabolised in the liver. Complete clearance of caffeine from plasma and urine is not until 24-48 hours after ingestion of the last dose.
Caffeine has been shown to increase both short term intense exercise performance, 'stop-start' activities (football, rugby, etc), long distance running and help our performance in the gym, so we can train more effectively and ultimately increase size and strength.