Low energy availability, not stress of exercise, alters LH pulsatility in exercising women.

@article{Loucks1998LowEA,
  title={Low energy availability, not stress of exercise, alters LH pulsatility in exercising women.},
  author={A. Loucks and M. Verdun and E. Heath},
  journal={Journal of applied physiology},
  year={1998},
  volume={84 1},
  pages={
          37-46
        }
}
We tested two hypotheses about the disruption of luteinizing hormone (LH) pulsatility in exercising women by assaying LH in blood samples drawn at 10-min intervals over 24 h from nine young, habitually sedentary, regularly menstruating women on days 8, 9, or 10 of two menstrual cycles after 4 days of intense exercise [E = 30 kcal.kg lean body mass (LBM)-1.day-1 at 70% of aerobic capacity]. To test the hypothesis that LH pulsatility is disrupted by low energy availability, we controlled the… Expand
412 Citations

Paper Mentions

Interventional Clinical Trial
The purpose of this experiment is to investigate whether the dependence of luteinizing hormone pulsatility on energy availability declines during adolescence.  
ConditionsAmenorrhea, Anovulation, Infertility, (+1 more)
InterventionBehavioral
Luteinizing hormone pulsatility is disrupted at a threshold of energy availability in regularly menstruating women.
  • A. Loucks, J. Thuma
  • Biology, Medicine
  • The Journal of clinical endocrinology and metabolism
  • 2003
  • 453
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Slow restoration of LH pulsatility by refeeding in energetically disrupted women.
  • 19
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Low energy availability, not exercise stress, suppresses the diurnal rhythm of leptin in healthy young women.
  • 181
  • PDF
Slow restoration of LH pulsatility by refeeding in energetically disrupted women.
  • A. Loucks, M. Verdun
  • Medicine
  • American journal of physiology. Regulatory, integrative and comparative physiology
  • 1998
  • 37
Menstrual Disruption with Exercise Is Not Linked to an Energy Availability Threshold
  • 23
  • Highly Influenced
Low energy availability in exercising men is associated with reduced leptin and insulin but not with changes in other metabolic hormones
  • 57
  • Highly Influenced
LH secretion and testosterone concentrations are blunted after resistance exercise in men.
  • 72
  • PDF
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