Effects of the menstrual cycle on muscle recruitment and oxidative fuel selection during cold exposure
Blondin DP, Maneshi A, Imbeault MA, Haman F
Journal of applied physiology (Bethesda, Md. : 1985) · 17 citas
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Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Solo mecanismos
Quién lo pagó
- Financiación
- Financiación independiente
- Gobierno
- Natural Sciences and Engineering Research Council of Canada
Según 1 financiador declarado.
Publicación
- Publicado
- 2011-07-08 · J Appl Physiol (1985) · vol. 111 · número 4 · págs. 1014–1020
- Editorial
- American Physiological Society
- Citado
- 24 citas · más que el 78% de estudios similares · 1.2× el promedio de su campo
- Referencias
- 39 trabajos
- Acceso
- De pago
- Áreas de investigación
- Thermoregulation and physiological responses · Adipose Tissue and Metabolism · Cardiovascular and exercise physiology
- Palabras clave
- menstrual cycle, luteal phase, follicular phase, shivering, muscle recruitment, cold exposure, lipid utilization, carbohydrate utilization, protein utilization, core body temperature, thermogenesis, women, electromyography
- MeSH
- muscle, skeletal, humans, hormones, proteins, cross-over studies, energy metabolism, oxidation-reduction, body temperature regulation, thermogenesis, shivering, menstrual cycle, follicular phase, luteal phase, adult, female, carbohydrate metabolism, lipid metabolism, cold temperature, young adult
4 autores
- Denis P. Blondin🇨🇦University of Ottawa; Montfort Hospital
- Anali Maneshi🇨🇦University of Ottawa; Montfort Hospital
- Marie-Andrée Imbeault🇨🇦University of Ottawa; Montfort Hospital
- François Haman🇨🇦 · autor de correspondenciaUniversity of Ottawa; Montfort Hospital
Resumen
El texto original del estudio, en el idioma en que se publicó.
Differences in core temperature and body heat content, generally observed between the luteal and follicular phase of the menstrual cycle, have been reported to modulate the thermogenic activity of cold-exposed women. However, it is unclear how this change in whole body shivering activity will influence fuel selection. The goal of this study was to quantify the effects of the menstrual cycle on muscle recruitment and oxidative fuel selection during low-intensity shivering. Electromyographic activity of eight large muscles was monitored while carbohydrate, lipid, and protein utilization was simultaneously quantified in the follicular and luteal phases of the menstrual cycle in nonacclimatized women shivering at a low intensity. The onset (∼25 min), intensity (∼15% of maximal voluntary contraction), and pattern (∼6 shivering bursts/min) of the shivering response did not differ between menstrual cycle phases, regardless of differences in core temperature and hormone levels. This resulted in lipids remaining the predominant substrate, contributing 75% of total heat production, independent of menstrual phase. We conclude that hormone fluctuations inherent in the menstrual cycle do not affect mechanisms of substrate utilization in the cold. Whether the large contribution of lipids to total heat production in fuel selection confers a survival advantage remains to be established.
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