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Menstrual cycle AND Exercise

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https://www.readbyqxmd.com/read/29425972/a-longitudinal-analysis-of-salivary-testosterone-concentrations-and-competitiveness-in-elite-and-non-elite-women-athletes
#1
Blair T Crewther, Christian J Cook
BACKGROUND: There is evidence linking women's T to competitive behaviours in sport and exercise. To advance this work, we examined the longitudinal relationships between salivary testosterone (sal-T) and competitiveness in athletic women who differ in training status. METHODS: Elite (n = 9) and non-elite (n = 21) women athletes were monitored on days 6-8 (follicular phase), 13-15 (ovulatory phase) and 20-22 (Luteal phase) of a menstrual cycle with two repeats...
February 6, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29417063/the-effect-of-aerobic-exercise-on-primary-dysmenorrhea-a-clinical-trial-study
#2
Zahra Mohebbi Dehnavi, Farzaneh Jafarnejad, Zahra Kamali
INTRODUCTION: Primary dysmenorrhea without pelvic pathology is one of the most common complaints in women's medicine. Primary dysmenorrhea can affect the quality of life of women. Aerobic exercise is one of the ways to reduce the severity of primary dysmenorrhea. The present study aimed to determine the effect of 8 weeks of aerobic exercise on the severity of primary dysmenorrhea. METHODS: This is a clinical trial study performed on 70 students with primary dysmenorrhea in dormitories of Mashhad University of Medical Sciences in 2015...
2018: Journal of Education and Health Promotion
https://www.readbyqxmd.com/read/29380957/pilot-study-an-acute-bout-of-high-intensity-interval-exercise-increases-12-5%C3%A2-h-gh-secretion
#3
Sarah E Deemer, Todd J Castleberry, Chris Irvine, Daniel E Newmire, Michael Oldham, George A King, Vic Ben-Ezra, Brian A Irving, Kyle D Biggerstaff
The purpose of this study was to test the hypothesis that high-intensity interval exercise (HIE) significantly increases growth hormone (GH) secretion to a greater extent than moderate-intensity continuous exercise (MOD) in young women. Five young, sedentary women (mean ± SD; age: 22.6±1.3 years; BMI: 27.4±3.1 kg/m2 ) were tested during the early follicular phase of their menstrual cycle on three occasions. For each visit, participants reported to the laboratory at 1700 h, exercised from 1730-1800 h, and remained in the laboratory until 0700 h the following morning...
January 2018: Physiological Reports
https://www.readbyqxmd.com/read/29345213/matcha-green-tea-drinks-enhance-fat-oxidation-during-brisk-walking-in-females
#4
Mark Elisabeth Theodorus Willems, Mehmet Akif Şahin, Matthew David Cook
Intake of the catechin epigallocatechin gallate and caffeine has been shown to enhance exercise-induced fat oxidation. Matcha green tea powder contains catechins and caffeine and is consumed as a drink. We examined the effect of Matcha green tea drinks on metabolic, physiological and perceived intensity responses during brisk walking. Thirteen females (age: 27±8 yr, body mass: 65±7 kg, height: 166±6 cm) volunteered. Resting metabolic equivalent (1-MET) was measured using Douglas bags (1-MET: 3.4±0.3 ml·kg-1·min-1)...
January 18, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29280410/iron-balance-and-iron-supplementation-for-the-female-athlete-a-practical-approach
#5
Charles R Pedlar, Carlo Brugnara, Georgie Bruinvels, Richard Burden
Maintaining a positive iron balance is essential for female athletes to avoid the effects of iron deficiency and anaemia and to maintain or improve performance. A major function of iron is in the production of the oxygen and carbon dioxide carrying molecule, haemoglobin, via erythropoiesis. Iron balance is under the control of a number of factors including the peptide hormone hepcidin, dietary iron intake and absorption, environmental stressors (e.g. altitude), exercise, menstrual blood loss and genetics. Menstruating females, particularly those with heavy menstrual bleeding are at an elevated risk of iron deficiency...
December 27, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29273090/exercise-and-reproductive-function-in-polycystic-ovary-syndrome-protocol-of-a-systematic-review
#6
Isis Kelly Dos Santos, Romilson de Lima Nunes, Gustavo Mafaldo Soares, Tecia Maria de Oliveira Maranhão, Paulo Moreira Silva Dantas
BACKGROUND: Although many post-participation outcomes in different types of physical training (e.g., aerobic and strength) have been previously investigated for the treatment of polycystic ovary syndrome, there is no recent systematic review of the relationship between various types of intervention and the reproductive function of women with PCOS. The current paper describes a systematic review protocol on the benefits of physical exercise and dietary or drug interventions on endocrinological outcomes in women with PCOS...
December 22, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/29207251/oral-contraceptives-modulate-the-muscle-metaboreflex-in-healthy-young-women
#7
Hanna R Parmar, Jasmin Sears, Yannick Molgat-Seon, Cara L McCulloch, Laura A McCracken, Courtney V Brown, Andrew William Sheel, Paolo B Dominelli
There are known sex-differences in blood pressure regulation. The differences are related to ovarian hormones that influence β-adrenergic receptors and the transduction of muscle sympathetic nerve activity. Oral contraceptives (OC) modulate the ovarian hormonal profile in women and therefore may alter the cardiovascular response. We questioned if OC would alter the absolute pressor response to static exercise and influence the day-to-day variability of the response. Healthy men (n=11) and women (n=19) completed a familiarization day and two experimental testing days...
December 5, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29202311/quantitative-sensory-response-of-the-scm-muscle-on-sustained-low-level-activation-simulating-co-contractions-during-bruxing
#8
Lydia Eberhard, Sophia Terebesi, Nikolaos Nikitas Giannakopoulos, Daniel Hellmann, Hans-Jürgen Schindler, Marc Schmitter, Doreen Pfau
OBJECTIVE: Bruxism is discussed as an etiological factor in the pathogenesis of orofacial and cervical pain. As the sternocleidomastoid muscle (SCM) is co-activated during clenching, our aim was to investigate, whether the muscle loading leads to peripheral or central sensitizations. DESIGN: In twenty-one healthy female volunteers, somatosensory profiles of the SCM were recorded according to the test battery of the German Research Network on Neuropathic Pain (DFNS) prior to and after an isometric muscle exercise...
November 10, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29200635/the-effects-of-the-menstrual-cycle-on-the-static-balance-in-healthy-young-women
#9
Byung Joon Lee, Ki Hun Cho, Wan Hee Lee
[Purpose] The purpose of this study was to investigate the effects of the menstrual cycle on the static balance of healthy young women. [Subjects and Methods] Eighteen healthy young subjects (mean age 19.1 years; weight 57.5 kg; height 159.9 cm) participated in this study. The Good Balance system was used to measure the postural sway speed and velocity moment of subjects in the static standing posture. Subjects were measured for static balance between 1 and 3 days after menstruation and 13 days after menstruation...
November 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29197944/experience-of-symptoms-and-disease-impact-in-patients-with-adenomyosis
#10
Linda M Nelsen, William R Lenderking, Robin Pokrzywinski, Zaneta Balantac, Libby Black, Shibani Pokras, Mary Beth Enslin, Melisa Cooper, Andrea S Lukes
BACKGROUND: Adenomyosis is a poorly understood, benign disease of the uterus. OBJECTIVE: In this study, patient interviews were conducted to characterize the symptoms and impact of adenomyosis. METHODS: This was a cross-sectional study in which women with adenomyosis were recruited from five US clinics and a health-related social network forum. Participants (aged 18-55 years) were pre-menopausal with a history of regular menstrual cycles...
December 2, 2017: Patient
https://www.readbyqxmd.com/read/29083061/the-impact-of-menstrual-phase-on-brachial-artery-flow-mediated-dilation-during-handgrip-exercise-in-healthy-premenopausal-women
#11
Katrina A D'Urzo, Trevor J King, Jennifer S Williams, Morgan D Silvester, Kyra E Pyke
Flow-mediated dilation (FMD) in response to a sustained shear stress stimulus (e.g. via handgrip exercise; HGEX) is emerging as a useful tool for assessing endothelial function; however, the impact of menstrual phase on HGEX-FMD is unknown. The purpose of this study was to determine whether HGEX-FMD fluctuates with cyclical changes in estrogen levels over two discrete phases (low and high estrogen) of the menstrual cycle. Brachial artery (BA) diameter and blood velocity were assessed with 2D and Doppler ultrasound, respectively...
October 30, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29023359/menstrual-disruption-with-exercise-is-not-linked-to-an-energy-availability-threshold
#12
Jay L Lieberman, Mary Jane De Souza, David A Wagstaff, Nancy I Williams
INTRODUCTION: Chronic reductions in energy availability (EA) suppress reproductive function. A particular calculation of EA quantifies the dietary energy remaining after exercise for all physiological functions. Reductions in LH pulse frequency have been demonstrated when EA using this calculation is < 30 kcal/ kg ffm·d. PURPOSE: We determined whether menstrual disturbances (MD) are induced when EA is < 30 kcal/ kg ffm·d. METHODS: Thirty-five sedentary, ovulatory women 18-24 yr (weight= 59...
October 10, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28977777/omega-3-polyunsaturated-fatty-acid-docosahexaenoic-acid-and-its-role-in-exhaustive-exercise-induced-changes-in-female-rat-ovulatory-cycle
#13
Abeer F Mostafa, Shereen M Samir, Reham M Nagib
INTRODUCTION: Exhaustive exercises can cause delayed menarche or menstrual cycle irregularities in female. Omega-3 polyunsaturated fatty acids (ω-3 PUFAs) are incorporated into a wide range of benefits in many physiological systems. AIM OF WORK: aimed to assess the role of ω-3 PUFA docosahexaenoic acid (DHA) on the deleterious effects of exhaustive exercise on female reproductive system in rats. MATERIALS AND METHODS: virgin female rats were randomly divided into four groups (12 rats in each): Control group (C), Omega 3 (ω-3) group treated with DHA, exhaustive exercise group (Ex), and exhaustive exercised rats treated with DHA...
October 4, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28970163/establishment-of-a-chronic-activity-based-anorexia-rat-model
#14
Linda Frintrop, Stefanie Trinh, Johanna Liesbrock, Lisa Paulukat, Martien J Kas, Rene Tolba, Kerstin Konrad, Beate Herpertz-Dahlmann, Cordian Beyer, Jochen Seitz
BACKGROUND: Anorexia nervosa (AN) is often a chronic eating disorder characterised by body image disturbance and low body weight often associated with starvation-induced amenorrhoea and excessive exercise. Activity-based anorexia (ABA) is an animal model representing many somatic aspects of this psychiatric illness. We systematically manipulated the extent and length of starvation and animal age to find the optimal parameters to study chronic starvation. NEW METHODS: Wistar rats had 24h/day running wheel access and received 40% of their baseline food intake until a 20% or 25% weight reduction was reached (acute starvation)...
September 29, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28930874/the-effectiveness-of-fish-oil-supplementation-in-attenuating-exercise-induced-muscle-damage-in-females-during-mid-follicular-and-mid-luteal-menstrual-phases
#15
Sarah K McKinley-Barnard, Thomas L Andre, Josh J Gann, Paul S Hwang, Darryn S Willoughby
The purpose of this study was to determine if the differences in estrogen levels during the female menstrual cycle and fish oil supplementation would attenuate eccentric exercise-induced muscle damage (EIMD) and delayed onset muscle soreness (DOMS). In a double-blind fashion, 22 physically-active females (20.9 ± 1.4 years, 63.5 ± 9.0 kg, 165.2 ± 7.5 cm) were randomly assigned to ingest either 6 grams of fish oil (n = 11) or placebo (n = 11) daily for 21 days. Participants underwent an eccentric exercise bout of the knee extensors on two occasions during the mid-follicular (MF) and mid-luteal (ML) phases of the 28-day menstrual cycle...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28906053/the-effects-of-menstrual-cycle-phase-on-the-incidence-of-plateau-at-v%C3%AB-o2max-and-associated-cardiorespiratory-dynamics
#16
Dan Gordon, Adrian Scruton, Richard Barnes, James Baker, Luciano Prado, Viviane Merzbach
The purpose of this study was to examine the effect of menstrual cycle phase on maximal oxygen uptake (V˙O2max) and associated cardiodynamic responses. A total of 16 active females volunteered of which n = 10 formed the non-oral contraceptive pill group (n-OCP), displaying a regular menstrual cycle of 28·4 ± 2·2 days (age 20·6 ± 1·6 years, height 169·9 ± 6·4 cm, mass 68·7 ± 7·9 kg) and n = 6 formed the oral contraceptive pill group (OCP) (monophasic pill) (age 21·7 years ± 2·16, height 168·1 cm ± 6·8 cm, mass 61·6 ± 6·8 kg)...
September 14, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28886820/gastrointestinal-conditions-in-the-female-athlete
#17
REVIEW
Barry Kent Diduch
Exercise can have significant effects on gastrointestinal diseases. Regular, moderate exercise can impart beneficial effects for the intestinal microbiome, irritable bowel syndrome symptoms, and inflammatory bowel disease. High-intensity training or prolonged endurance training, on the other hand, can have negative effects on these same entities. Female athletes report a higher prevalence of irritable bowel syndrome and celiac disease, and furthermore, have gastrointestinal symptoms modulated by the menstrual cycle...
October 2017: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/28886819/nutritional-aspects-of-the-female-athlete
#18
REVIEW
Kelly A Rossi
Athletes have specific needs based on sex, size, sport, exercise intensity, duration of activity, phase of training, and the season in which the sport is played. Nutritionally, the female athlete is unique, with needs that may vary based on hormonal fluctuations related to the menstrual cycle. This article provides an overview of the distinct nutritional needs and concerns of the physically active female, including energy availability, macronutrient needs, micronutrient needs, hydration, supplements, and other nutritional issues...
October 2017: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/28847143/description-of-three-female-24-h-ultra-endurance-race-winners-in-various-weather-conditions-and-disciplines
#19
Daniela Chlíbková, Thomas Rosemann, Beat Knechtle, Pantelis T. Nikolaidis, Alena Žákovská, Karl Sudi
A The incidence of exercise-associated hyponatremia (EAH) is higher in women than in men. We present three cases of a very mild post-race EAH in female winners of three 24-h ultra races in various weather conditions and disciplines with post-race plasma sodium [Na⁺] levels of 134 mM (Case 1), 133 mM (Case 2) and 134 mM (Case 3). Moreover, Case 1 and Case 2 showed elevated creatine kinase concentrations of >10,000 U/l with an absence of renal function abnormality. The common characteristics were female sex, veteran recreational category, long race experience in the particular sports discipline, excellent race performance, similar total weekly training hours and the presence of luteal phase of the menstrual cycle during the race...
August 31, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28723842/reduced-neuromuscular-performance-in-amenorrheic-elite-endurance-athletes
#20
Åsa B Tornberg, Anna Melin, Fiona Manderson Koivula, Anders Johansson, Sven Skouby, Jens Faber, Anders Sjödin
INTRODUCTION: Secondary functional hypothalamic amenorrhea (SFHA) is common among female athletes, especially in weight-sensitive sports. The aim of this study was to investigate the link between SFHA and neuromuscular performance in elite endurance athletes. METHODS: Sixteen eumenorrheic (EUM) and 14 SFHA athletes from national teams and competitive clubs participated. Methods included gynecological examination, body composition (dual-energy x-ray absorptiometry), resting metabolic rate and work efficiency, exercise capacity, knee muscular strength (KMS) and knee muscular endurance (KME), reaction time (RT), blood sampling performed on the third to fifth days of the menstrual cycle, and 7-d assessment of energy availability...
December 2017: Medicine and Science in Sports and Exercise
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