What question did this study set out to answer?

The study aims to investigate how the ovarian cycle affects sympathetic neural responses during static exercise.

December 1, 1998Journal of Applied PhysiologyOpen Access

Effects of the ovarian cycle on sympathetic neural outflow during static exercise

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Why the study?

Does the phase of the ovarian cycle affect muscle sympathetic nerve activity during static exercise in women?

Population

10 women, mean age 24.1 +/- 1.7 years

Comparison

Static handgrip exercise at 30% maximal… vs Static handgrip exercise at 30% maximal…

Design

Cross-sectional

Authors

SESteven M. EttingerInterventional / Structural Cardiology DSDavid SilberMedizinische Hochschule Hannover KGKristen S. GrayGeneral / Preventive / Lipids

Discussion

Member takes

Implication

Ovarian cycle phase may modulate sympathetic responses to exercise; hypothesis-generating and should not yet change practice.

Key Points

The study aims to investigate how the ovarian cycle affects sympathetic neural responses during static exercise.
Compared muscle sympathetic nerve activity responses in 10 women during menstrual and follicular phases of the ovarian cycle.
Employed microneurography for measuring MSNA and assessed hormone levels.
Utilized 31P-NMR spectroscopy to evaluate metabolic changes during different exercise conditions.
MSNA responses were significantly greater during the menstrual phase compared to the follicular phase (P = 0.01).
Estrogen levels were lower during the menstrual phase (75 +/- 5.5 pg/ml) compared to the follicular phase (116 +/- 9.6 pg/ml; P = 0.002).
No significant differences in H+ and H2PO-4 concentrations were observed during rhythmic handgrip exercise (n = 5).

Structured PICO

Does the phase of the ovarian cycle affect muscle sympathetic nerve activity during static exercise in women?

Population

10 women, mean age 24.1 +/- 1.7 years

Intervention

Static handgrip exercise at 30% maximal voluntary contraction during the menstrual phase (days 1-4)

Comparator

Static handgrip exercise at 30% maximal voluntary contraction during the follicular phase (days 10-12)

Outcome

Changes in muscle sympathetic nerve activity (MSNA)surrogate

Muscle sympathetic nerve activity during static exercise is increased during the menstrual phase compared to the follicular phase, suggesting ovarian cycle phases influence sympathetic neural outflow.

Cite This Study

Ettinger et al. (1998) studied this question.

synapsesocial.com/papers/6a207ff0b9ae31350fa5e152 https://doi.org/10.1152/jappl.1998.85.6.2075

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Effects of the ovarian cycle on sympathetic neural outflow during static exercise

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Effects of the ovarian cycle on sympathetic neural outflow during static exercise

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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