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Effects of Ketogenic Diet on Reproductive Hormones in Women With Polycystic Ovary Syndrome.
J Endocr Soc
August 2023
Biochemistry Unit, Specialised Diagnostic Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health Malaysia, 50588 Kuala Lumpur, Malaysia.
Context: Ketogenic diet has recently made a comeback as a part of lifestyle and dietary modifications in patients with polycystic ovary syndrome (PCOS). Despite studies suggesting its beneficial effects in reversing hormonal imbalance in women with PCOS, evidence has been patchy and derived from small populations under varying conditions.
Objective: To pool evidence from clinical trials to study the effects of ketogenic diet on reproductive hormones (LH/FSH ratio, free testosterone, serum progesterone) and observe evidence of weight change.
Associations Between Repeated Measures of Urinary Phthalate Metabolites With Hormones and Timing of Natural Menopause.
J Endocr Soc
February 2023
Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109-2029, USA.
Phthalates, ubiquitous endocrine-disrupting chemicals, may affect ovarian folliculogenesis and steroidogenesis. We examined the associations of urinary phthalate metabolites with hormones including estradiol, testosterone, follicle-stimulating hormone (FSH), sex hormone-binding globulin (SHBG), and anti-Müllerian hormone (AMH), and timing of natural menopause in midlife women. Data were from 1189 multiracial/multiethnic women aged 45 to 56 years without hormone therapy from the Study of Women's Health Across the Nation (SWAN).
View Article and Find Full Text PDFMarkers of Low Energy Availability in Overreached Athletes: A Systematic Review and Meta-analysis.
Sports Med
December 2022
The Human Performance and Health Research Laboratory, Department of Human Health and Nutritional Sciences, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada.
Background: Overreaching is the transient reduction in performance that occurs following training overload and is driven by an imbalance between stress and recovery. Low energy availability (LEA) may drive underperformance by compounding training stress; however, this has yet to be investigated systematically.
Objective: The aim of this study was to quantify changes in markers of LEA in athletes who demonstrated underperformance, and exercise performance in athletes with markers of LEA.
Changes in Performance and Morning-Measured Responses in Sport Rock Climbers.
J Hum Kinet
November 2019
Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland.
The aim of this study was to determine changes in climbers' hormonal, cardiovascular, neuromuscular, sleep and fatigue status, and their relationship with performance and workloads during a sport rock climbing camp. Mean difficulty of individual leading climbing routes (mean Difficulty) was calculated for six male, intermediate level sport rock climbers participating in a 2-week camp in Orpierre. Additionally, each morning climbers were tested for: cortisol (d-Cortisol) and testosterone (d-Testosterone) concentrations, testosterone/cortisol ratio (T/C), heart rate and heart rate variability in supine (d-L-HR, d-L-SD1, d-L-SD2) and standing positions (d-S-HR, d-S-SD1, d-S-SD2), difference in S-HR and L-HR (HR-S-L), maximal voluntary hand grip strength (MVC), sleep duration (Sleep) and the self-perception of fatigue (M-Fatigue).
View Article and Find Full Text PDFHair hormones in male youth with internet gaming disorder.
World J Biol Psychiatry
April 2019
a University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bern , Switzerland.
Internet gaming disorder (IGD) is associated with altered physiological reactivity to psychosocial stress. Findings from a previous study on alterations of basal hypothalamic-pituitary-adrenal (HPA) axis functioning, indexed by differences in hair hormone levels (i.e.
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