|Question on coffee for training||Eager Beagle|
Feb 12, 2002 2:40 AM
|It seems to be fairly widely accepted that coffee, drunk before training, can aid fat burn-off.
Question is - does this still work with decaff?
|re: Question on coffee for training||netso|
Feb 12, 2002 4:23 AM
|Unfortunately, the answer is no.|
|From Cycling Performance Tips, Richard Rafoth, MD...||Zignzag|
Feb 12, 2002 9:43 AM
|"Caffeine is a member of a group of compounds called methylxanthines found naturally in coffee beans, tea leaves, chocolate, cocoa beans, guarana, and cola (kola) nuts.
During prolonged exercise, the onset of fatigue correlates closely with the depletion of muscle glycogen stores (and is delayed if glycogen is spared). The metabolism of free fatty acids (FFA) as an alternative energy source can lead to decreased use of muscle glycogen. Caffeine can increase blood FFAs, and it is felt that this is its major method of action. In one study, caffeine produced a 50% increase in FFA at 3 to 4 hours. This effect was seen after 300 mg of caffeine (An average 6 ounce cup of brewed coffee contains 100 - 150 mg of caffeine).
There is speculation that some of its benefits may also be related to its central nervous system effect as a stimulant, and a recent study has demonstrated a direct positive effect on the muscle fiber itself with a reported 7% increase in power output over a 6 second cycle exercise task.
In one controlled study, subjects were able to perform for 90 minutes to fatigue as compared to 75 minutes in controls (a 20% increase) after the drinking the equivalent of 3 cups of coffee or 6 caffeinated colas 1 hour before, even though values for heart rate and oxygen uptake were similar in both groups. Another study, looking at performance with acute altitude change (4300 meters), demonstrated a 50% increase in performance with caffeine supplements. How this would help at lesser elevations, riding in the Rocky Mountains for example, is not clear.
A suggested dose of caffeine for the recreational rider is 5 mg per kg of body weight if you are taking a tablet or 1.2 cups of coffee per 100 pounds of body weight taken 1 hour before the ride although some riders prefer smaller doses taken periodically throughout the ride itself.
But there are potential side effects. Caffeine can cause headaches, insomnia, and nervous irritability. In addition it is a potent diuretic and can lead to dehydration. However the biggest negative is that in high concentrations it is considered a drug and is banned by the US Olympic Committee and US Cycling Federation (to exceed the US cycling Federation's legal limit for caffeine - urine concentration of 12 micrograms/ml - one would have to ingest 600 mg of caffeine and have a urine test within 2 to 3 hours).
The bottom line is that most endurance athletes consider caffeine useful if used correctly. This includes a period of abstinence for several weeks before the event as habitual use induces tolerance."
|Caffeine free coffee should've another name! skip to ephedra...||tempeteKerouak|
Feb 12, 2002 10:07 AM
|...and loose weight AND you mind! he he!
The benefits in weight loss with caffeine (if any) would be anihilated by milk and sugar... So black it is.
Up to 5 mg per kg? That's a lot of poppers! Carbon fork and steering damper recommanded...