Severity of energy-related menstrual disturbances increases in proportion to indices of energy conservation in exercising women.
Level 4 - case-series / case-control
Observational cross-sectional study examining metabolic parameters across menstrual status categories
PubMed 17418159 · doi:10.1016/j.fertnstert.2006.11.171
What was done
The study evaluated markers of energy conservation, specifically resting energy expenditure and metabolic hormones, across a spectrum of menstrual disturbances (including luteal-phase defects, anovulation, and amenorrhea) in exercising women.
What was found
The abstract reports no numerical values, sample sizes, effect sizes, or statistical metrics. It qualitatively states that alterations in resting energy expenditure and metabolic hormones increased in magnitude across the continuum of worsening menstrual disturbance severity.
Why it matters
These findings suggest that clinical menstrual disorders in exercising women exist on a continuum driven by energy availability, where even subtle energetic deficits can trigger detectable reproductive dysfunction.
Limits
The abstract omits essential details, including sample size, specific hormones measured, patient selection criteria, exact diagnostic definitions, and all quantitative data (means, standard deviations, or p-values).
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