Enter your Email address:
Wolters Kluwer Health may email you for journal alerts and information, but is committed
to maintaining your privacy and will not share your personal information without
You currently have no recent searches
Langill, R H.1; Smith, G J.1; Rhodes, E C. FACSM1
1University of British Columbia, Vancouver, B. C. Canada
The purpose of this study was to determine if pre-exercise glucose ingestion (at 5 min and 35 min) would improve 4000m swimming performance. Ten male triathletes (Mean ± SD: age 29.5 ± 5.0 yrs, VO2max 3.74 ± 0.10 L.min−1) swam 4000m on three occasions following the consumption of either; 1. A 10% glucose solution 5-min prior to exercise (G5), 2. A 10% glucose solution 35-min prior to exercise (G35), 3. A similar volume of placebo (PL). Dietary intake and exercise were regulated for 48 hours prior to each trial. Despite a significant difference (p < 0.01) in blood glucose concentration prior to exercise (Mean ± SD in mmol.L−1: G35 8.4 ± 1.1, G5 5.2 ± 0.5, PL 5.3 ± 0.4), no significant differences were observed in total time (Mean ± SD in minutes: G35 70.7 ± 7.6, G5 70.1 ± 7.6, PL 71.9 ± 8.4), post-exercise blood glucose (Mean ± SD in mmol.L−1: G35 5.1 ± 1.1, G5 5.1 ± 0.9, PL 5.3 ± 0.4), and average heart rate (Mean ± SD in bpm: G35 155.8 ± 10.8, G5 153.6 ± 12.6, PL 152.0 ± 12.5) (p > 0.05). The results of this study indicate that despite a greater reliance on carbohydrate with this mode of exercise, there was no significant improvement in performance following glucose ingestion. The data further indicates that no decrements to performance were observed following the ingestion of a high glycemic solution thirty-five minutes prior to exercise, despite significant differences in blood glucose between trials immediately prior to exercise.
©2001The American College of Sports Medicine
Colleague's E-mail is Invalid
Your Name: (optional)
Separate multiple e-mails with a (;).
Thought you might appreciate this item(s) I saw at Medicine & Science in Sports & Exercise.
Send a copy to your email
Your message has been successfully sent to your colleague.
Some error has occurred while processing your request. Please try after some time.
An Existing Folder
A New Folder
The item(s) has been successfully added to "".
Login with your LWW Journals username and password.
Username or Email:
Enter and submit the email address you registered with. An email with instructions to reset your password will be sent to that address.
Link to reset your password has been sent to specified email address.
What does "Remember me" mean?
By checking this box, you'll stay logged in until you logout. You'll get easier access to your articles, collections,
media, and all your other content, even if you close your browser or shut down your
To protect your most sensitive data and activities (like changing your password),
we'll ask you to re-enter your password when you access these services.
What if I'm on a computer that I share with others?
If you're using a public computer or you share this computer with others, we recommend
that you uncheck the "Remember me" box.
Save my selection