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
Collins, Sean; Sawyer, Jason; Gregory, Sarah; Van Langen, Deborah; Dietel, Karen; Matthews, Tracey; Paolone, Vincent FACSM
Springfield College, Springfield, MA. (Sponsor: Vincent Paolone, FACSM)
(No disclosure reported)
PURPOSE: The objective of the current research study was to observe the influence of the rate of rehydration on exercise performance on dehydrated males (N=10) in a thermoneutral environment.
METHODS: Each subject performed three testing sessions, including a O2peak test and two 1 hr cycle rides (75% O2peak) while dehydrated. During each of the 1 hr cycle rides, the subjects were administered a randomly selected rehydration strategy (4 × 250 ml every 15 min or 2 × 500 ml at 30 and 45 min). Numerous variables were collected throughout the course of each trial. Body Temperature and physiological variables were collected every 5 min and 11 2 × 13 ANOVAs were run. For blood variables, eight 2 × 3 ANOVAs were utilized, followed by t-tests on the changes in weights (D weights) and thermoregulatory data.
RESULTS: Significant (p <.05) and expected changes over time existed for temperature and physiological data. No significant differences (p >.05) for the D weights or thermoregulatory data were reported. A significant interaction (p <.05) in percent change in plasma volume as well as a significant difference (p <.05) in hematocrit and cell volume were reported, indicating the possible benefits of rehydration early in an exercise bout rather than later when dehydrated.
CONCLUSION: Enahncements or maintenece of plasma volume and hematocrit concentrations may indicate a benefit to performance by limiting cardiovascular strain during exericse. Increases in hematocrit and cell volume would have negatively affected cardiovascular performance through increased blood viscosity. By maintaining hematocrit levels and plasma volume through rehydration, performance may be enhance through decreasing cardiovascular strain over the duration of exericse.
© 2010 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
Article Level Metrics