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http://hdl.handle.net/1843/49080| Type: | Artigo de Periódico |
| Title: | The effects of menstrual cycle phase on the incidence of plateau at VO2max and associated cardiorespiratory dynamics |
| Authors: | Dan Gordon Adrian Scruton Richard Barnes James Baker Luciano Sales Prado Viviane Merzbach |
| Abstract: | The purpose of this study was to examine the effect of menstrual cycle phase on maximal oxygen uptake (V˙O2max) and associated cardiodynamic responses. A total of 16 active females volunteered of which n = 10 formed the non-oral contraceptive pill group (n-OCP), displaying a regular menstrual cycle of 28·4 ± 2·2 days (age 20·6 ± 1·6 years, height 169·9 ± 6·4 cm, mass 68·7 ± 7·9 kg) and n = 6 formed the oral contraceptive pill group (OCP) (monophasic pill) (age 21·7 years ± 2·16, height 168·1 cm ± 6·8 cm, mass 61·6 ± 6·8 kg). Each completed four incremental exercise tests for determination of V˙O2max, cardiac output, stroke volume and heart rate. Each test was completed according to the phases of the menstrual cycle as determined through salivary analysis of 17-β oestrodiol and progesterone. Non-significant differences were observed for V˙O2max across phases and between groups (P>0·05) with additional non-significant differences for Q˙max, HRmax and SVmax between groups. For ∆ V˙O2 during the final 60 s of the V˙O2max trial, significant differences were observed between OCP and n-OCP (P<0·05) with OCP showing zero V˙O2 plateaus in three pseudo-phases. Significant difference observed for a-vO2dif n-OCP between premenstruation and menstruation at 30-100% V˙O2max (P<0·05). Data suggest that the V˙O2 -plateau is effected by monophasic oral contraceptive pill, furthermore these data imply that V˙O2max test outcome is independent of menstrual cycle phase but caution should be applied when evaluating maximal oxygen uptake in females who are administered a monophasic oral contraceptive pill. |
| Subject: | Débito cardíaco Exercícios físicos Consumo de oxigênio Menstruação Acidente vascular cerebral |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | EEF - DEPARTAMENTO DE EDUCAÇÃO FÍSICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1111/cpf.12469 |
| URI: | http://hdl.handle.net/1843/49080 |
| Issue Date: | Jul-2018 |
| metadata.dc.url.externa: | https://onlinelibrary.wiley.com/doi/10.1111/cpf.12469 |
| metadata.dc.relation.ispartof: | Clinical Physiology and Functional Imaging |
| Appears in Collections: | Artigo de Periódico |
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