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The influence of menstrual cycle phase upon postexercise hypotension
Joseph I Esformes1, Frances Norman, Joanne Sigley
1Centre for Sports and Exercise Sciences, Institute of Membranes and Systems Biology, University of Leeds, Leeds, United Kingdom.
Medicine and Science in Sports and Exercise
|March 17, 2006
Summary
Postexercise hypotension (PEH) is influenced by the menstrual cycle. Lower blood pressure was observed in the early follicular phase, suggesting hormonal impacts on cardiovascular recovery after exercise.
Area of Science:
- Cardiovascular Physiology
- Reproductive Endocrinology
Background:
- Postexercise hypotension (PEH) is a well-documented phenomenon following aerobic exercise.
- The influence of the menstrual cycle on PEH has not been previously investigated.
Purpose of the Study:
- To examine the pattern of postexercise hypotension (PEH) across different phases of the menstrual cycle.
- To assess the impact of early follicular (EF), late follicular (LF), and midluteal (ML) phases on hemodynamic responses after exercise.
Main Methods:
- Eight eumenorrheic women underwent 30 minutes of exercise at 80% lactate threshold.
- Hemodynamic measurements, including blood pressure and calf vascular resistance, were taken at rest and for 45 minutes postexercise.
- Central hemodynamics were assessed using echocardiography.
Main Results:
- Resting cardiovascular parameters did not differ significantly across menstrual phases.
- Mean arterial and diastolic blood pressures were significantly lower in the EF phase compared to LF and ML phases.
- Calf vascular resistance showed a significant interaction with recovery time, increasing more in the ML phase.
Conclusions:
- Postexercise hypotension (PEH) is modulated by the menstrual cycle phase.
- Enhanced buffering of PEH is observed during the late follicular (LF) and midluteal (ML) phases, potentially due to elevated estrogen levels.
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