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Changes in energy expenditure during the menstrual cycle

Published online by Cambridge University Press:  09 March 2007

J. T. Bisdee
Affiliation:
Dunn Clinical Nutrition Centre, 100 Tennis Court Road, Cambridge CB2 IQL
W. P. T. James
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
M. A. Shaw
Affiliation:
Department of Pharmacology, The University, Leeds LS2 9JT
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Abstract

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1. Eight women were studied under metabolic-ward conditions while consuming a constant diet throughout a single menstrual cycle. Basal body temperature, salivary and urinary hormone concentrations were used in monitoring the cycle and designing the study so that whole-body calorimetry for 36 h was conducted at four phases of the cycle in relation to the time of ovulation.

2. The metabolic rate during sleep showed cyclical changes, being lowest in the late follicular phase and highest in the late luteal phase. The increase amounted to 6.1 (SD 2.7)%. Energy expenditure (24 h) also increased but the change was not statistically significant (P > 0.05). Exercise efficiency did not change during the cycle.

3. There were no significant changes in plasma thyroxine, 3, 5, 3'-triiodothyronine or free 3, 5, 3'-triiodothyronine concentrations to explain the metabolic rate changes; nor did they relate to urinary luteinizing hormone, pregnanediol-3α-glucuronide or oestrone-3-glucuronide excretion rates. No link with salivary cortisol or progesterone concentrations was observed, but there was a small inverse relation between the individual increase in sleeping metabolic rate and the subjects' falling ratio of urinary oestrone-3-glucuronide: pregnanediol-3α-glucuronide.

Information

Type
Research Article
Copyright
Copyright © The Nutrition Society 1989