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It has been known for some time that caffeine has a positive effect on athletes that experience exercise-induced asthma (also known as exercise-induced bronchoconstriction).  A recent study published by the International Journal of Sports Medicine, “Comparative Effects of Caffeine and Albuterol on the Bronchoconstrictor Response to Exercise in Asthmatic Athletes” found that moderate (6mg/kg) to high (9mg/kg) doses of caffeine provided a “significant protective effect against EIB”.

 

The study was conducted on ten asthmatic subjects. Though the sample size was relatively small, it was a randomized, double-blind, double-dummy crossover study. One hour pre-exercise, subjects were given 0, 3, 6, or 9mg/kg of caffeine or a placebo. Then, fifteen minutes pre-exercise subjects were given albuterol or a placebo. Scientists administered pulmonary function tests pre-and post-exercise to evaluate effectiveness of albuterol plus caffeine, albuterol plus caffeine placebo, caffeine plus albuterol placebo and placebo.

 

While caffeine only did provide some positive effects, caffeine did not seem to improve the affects of albuterol.

 

If you experience EIA/EIB, it might be worth reviewing the results of this study with your doctor. The study concluded that negative effects of daily use of short-acting beta2-agonists could be reduced by increasing caffeine consumption prior to exercise.

 

Notes:

To find your weight in kg, divide weight in pounds by 2.2

Caffeine content of common foods published by Center for Science in the Public Interest

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In the past couple of weeks, I’ve been getting some great reader questions and feedback. I will admit that I have a backlog of questions to get to and I think the answers will help several of you. Stay tuned.

I’ve also received some nice compliments, which always make me feel good that the training plans, blogs and columns are helping people. It keeps me motivated to know that people benefit from my work.

For today’s blog, one reader requested that I re-post the column on bike fit for women. Thanks Chris, will do.

In Chris’s e-mail I’m glad to read that outdated bike industry myths, at least at one company, are changing. Perhaps a better description is “have changed”?

The e-mail and link to that blog post is included below. 

 

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Hi there Gale,

I was directed to a blog post of yours from a while ago:

Women’s Bike Fit – Where the Trouble Started

I just wanted to say that I certainly hope you’ll consider reposting this again, as it is in keeping with everything we learned when we first started changing the design of our bikes to fit women.

We were also going on the notion that the ole proportion stereotypes were true, because it’s what ‘they said’, after all. But, when we started examining the science behind the difference between us and them, we found out, like you, that there wasn’t any evidence to support the LL/ST myth.

I spent my first 5 years at Trek as the WSD demo chick, and I went around the US trying to educate women and our dealers that LL/ST was something to stop believing and talking about. I explained that it was pelvic placement that lead to our decision to change the fit for WSD bikes, and that proportions were not part of the equation. Every time I thought I was making progress to blow the myth out of the water, it would resurface. Very frustrating.

In short, your post reads like a breath of ash cloud-free air. The message needs to be heard again.

Regards,

-Chris Garrison
--
UK Media Maven
Trek Bicycle
Maidstone  Road | Kingston | Milton Keynes | Buckinghamshire | MK10 0BE | Direct Line: 01908 280668 | Twitter: @TrekUKMedia | Email: chris_garrison@trekbikes.com

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