's Forum Archives - General

Archive Home >> General(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 )

Clif Shot Gel Questions .. ? effect of caffeine during ride?(6 posts)

Clif Shot Gel Questions .. ? effect of caffeine during ride?Frankl
Dec 4, 2001 10:08 PM
i like the taste of Clif bar as a little energy boost. but i am looking at the Clif Shot for easier use during ride. i noticed that the Mocha Mocha flavor is caffeinated and the rest of the flavor is not.

i am wondering what's the effect of caffeine in the Clif Shot as a power boost if there is any? better or worse? should i stay away from caffeine during ride or not? or there are better energy gel out there?

thanks a lot!
re: Clif Shot Gel Questions .. ? effect of caffeine during ride?morey
Dec 5, 2001 4:29 AM
Caffeine is a diuretic, making you lose water.
Caffeine taken 1/2 hour before a ride boosts the fatty acid levels in the blood stream. This is an effective way to burn fat and get an energy boost.
re: Clif Shot Gel Questions .. ? effect of caffeine during ride?Elefantino
Dec 5, 2001 6:38 AM
Sonic Strawberry is also caffeinated. There may be better gels out there, but Clif Snot ... er, Shot ... works well for me. I consider it my secret century weapon.
Be WarnedGalibier
Dec 5, 2001 8:53 AM
Desperately gulping caffeinated gel packets during particularly intensive race situations could lead to clogging of the trachea and chemical burning of the esophagus. Can nutrients be absorbed through the lining of your throat?
this from Cycling Performance Tips, Richard Rafoth, MD....Zignzag
Dec 5, 2001 9:25 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."
Good info...thanks...(NM)Me Dot Org
Dec 5, 2001 9:35 AM