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
Vella, C A.1; Dalleck, L C.1; Kravitz, L1; Mermier, C1; Robergs, R A.1
1University of New Mexico, Albuquerque, NM
The purpose of this study was to examine differences in fuel utilization (RER) during graded walking at moderate altitude (1592 m) and simulated sea level (FIO2 25%).
Twenty male and female subjects (mean ±SD, age: 28 ± yrs; height: 171 ± cm; weight: 67.8 ± 18.1 kg) completed two, randomized testing sessions under normobaric normoxia (NN) and normobaric hyperoxia (NH). VO2 and RER were measured while subjects walked 1.9 mph at eight separate grades (0, 5, 10, 15, 18, 21, 24, 27). Steady state VO2 and RER values were averaged during the last 2 min of each stage and compared between the NN and NH trials.
VO2 was significantly higher (p < 0.05) during NH compared to NN at all, except for one, of the walking grades (10%). RER values were significantly lower (p < 0.05) during NH at all walking grades (0–27%) when compared to NN.
Decreased RER values were associated with increased VO2 values during hyperoxia at each submaximal workload compared to normoxia. This finding has been reported in previous research and has been interpreted to signify an increased lipid utilization to maintain ATP resynthesis and muscle contraction during hyperoxia conditions. We hypothesize that the decrease in RER during hyperoxia may indicate a glycogen sparing benefit associated with living and training at moderate altitude.
©2003The 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