Women at altitude: Changes in carbohydrate metabolism at 4,300-m elevation and across the menstrual cycle

Barry Braun, Gail E. Butterfield, Shannon B. Dominick, Stacy Zamudio, Rosann G. Mccullough, Paul Rock, Lorna G. Moore

Research output: Contribution to journalArticle

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Abstract

We hypothesized that, in women, the blood glucose response to a meal (BGR) would be lower after exposure to 4,300 m compared with sea level (SL) and that BGR would be reduced in the presence of estrogen plus progesterone (E+P) relative to estrogen alone (E). Sixteen women were studied in both the E and E+P conditions at SL and in either the E or E+P condition at 4,300 m. On day 9 in each condition, blood was sampled before, and every 30 min for 2 h after, the subjects ate a high-carbohydrate meal. At 4,300 m, BGR peaked at a lower value (5.73 ± 0.94 mM) than at SL (6.44 ± 1.45 mM) and returned to baseline more slowly (P < 0.05). Plasma insulin values were the same but C peptide was slightly higher at 4;300 m (P < 0.05). At SL, BGR returned to baseline more slowly in E+P condition (5.13 ± 0.89 and 5.21 ± 0.91 mM at 60 and 90 min, respectively) relative to E condition (4.51 ± 0.52 and 4.69 ± 0.88 mM, respectively) (P < 0.05). Insulin and C peptide were not different between E and E +P conditions. The data indicate that BGR is lower in women at high altitude compared with the SL, possibly due to greater suppression of hepatic glucose production or stimulation of peripheral glucose uptake by insulin. BGR was lower in E condition relative to E+P condition at SL and possibly at 4,300 m, but the relative concentrations of ovarian hormones do not appear to alter the magnitude of the change in BGR when women are exposed to high altitude.

Original languageEnglish
Pages (from-to)1966-1973
Number of pages8
JournalJournal of Applied Physiology
Volume85
Issue number5
StatePublished - 1 Jan 1998

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Carbohydrate Metabolism
Menstrual Cycle
Oceans and Seas
C-Peptide
Insulin
Meals
Estrogens
Glucose
Progesterone
Blood Glucose
Carbohydrates
Hormones
Liver

Keywords

  • Estrogen
  • Glucose tolerance
  • Hypobaric hypoxia
  • Insulin sensitivity
  • Ovarian hormones
  • Progesterone

Cite this

Braun, B., Butterfield, G. E., Dominick, S. B., Zamudio, S., Mccullough, R. G., Rock, P., & Moore, L. G. (1998). Women at altitude: Changes in carbohydrate metabolism at 4,300-m elevation and across the menstrual cycle. Journal of Applied Physiology, 85(5), 1966-1973.
Braun, Barry ; Butterfield, Gail E. ; Dominick, Shannon B. ; Zamudio, Stacy ; Mccullough, Rosann G. ; Rock, Paul ; Moore, Lorna G. / Women at altitude : Changes in carbohydrate metabolism at 4,300-m elevation and across the menstrual cycle. In: Journal of Applied Physiology. 1998 ; Vol. 85, No. 5. pp. 1966-1973.
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Braun, B, Butterfield, GE, Dominick, SB, Zamudio, S, Mccullough, RG, Rock, P & Moore, LG 1998, 'Women at altitude: Changes in carbohydrate metabolism at 4,300-m elevation and across the menstrual cycle', Journal of Applied Physiology, vol. 85, no. 5, pp. 1966-1973.

Women at altitude : Changes in carbohydrate metabolism at 4,300-m elevation and across the menstrual cycle. / Braun, Barry; Butterfield, Gail E.; Dominick, Shannon B.; Zamudio, Stacy; Mccullough, Rosann G.; Rock, Paul; Moore, Lorna G.

In: Journal of Applied Physiology, Vol. 85, No. 5, 01.01.1998, p. 1966-1973.

Research output: Contribution to journalArticle

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AU - Butterfield, Gail E.

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Braun B, Butterfield GE, Dominick SB, Zamudio S, Mccullough RG, Rock P et al. Women at altitude: Changes in carbohydrate metabolism at 4,300-m elevation and across the menstrual cycle. Journal of Applied Physiology. 1998 Jan 1;85(5):1966-1973.