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hormonal and exercise

Morten Kristoffersen, Øyvind Sandbakk, Espen Tønnessen, Ida Svendsen, Gøran Paulsen, Elisabeth Ersvær, Irene Nygård, Kari Rostad, Anita Ryningen, Vegard V Iversen, Knut Skovereng, Bent R Rønnestad, Hilde Gundersen
Purpose: Although strength and sprint training are widely used methods in competitive cycling, no previous studies have compared the acute responses and recovery rates following such sessions among highly trained cyclists. The primary aim of the current study was to compare power production and biochemical markers of metabolic stress and muscle damage following a session of heavy strength (HS) and short-sprint training (SS). Methods: Eleven well-trained male cyclists (18 ± 2 years with maximal oxygen uptake of 67...
2018: Frontiers in Physiology
Modupe Akinola, Elizabeth Page-Gould, Pranjal H Mehta, Zaijia Liu
Prior research has found inconsistent effects of diversity on group performance. The present research identifies hormonal factors as a critical moderator of the diversity-performance connection. Integrating the diversity, status, and hormone literatures, we predicted that groups collectively low in testosterone, which orients individuals less toward status competitions and more toward cooperation, would excel with greater group diversity. In contrast, groups collectively high in testosterone, which is associated with a heightened status drive, would be derailed by diversity...
March 1, 2018: Psychological Science
Thais Regina de Mattos Lourenco, Priscila Katsumi Matsuoka, Edmund Chada Baracat, Jorge Milhem Haddad
INTRODUCTION AND HYPOTHESIS: People are increasingly aware of healthy lifestyles. Extenuating practice can injure the pelvic floor. Urinary incontinence (UI) is a prevalent condition in women whether they exercise professionally or not. The most common symptom is stress UI. It is reported in a large variety of sports and may interfere with everyday life or training, leading athletes to change or compromise their performance or risk compromising it. We aimed to assess the prevalence of UI in female athletes and to determine whether the type of sport might also influence UI...
March 19, 2018: International Urogynecology Journal
Bridget Linehan Logan, Lynn Foster-Johnson, Eleni Zotos
BACKGROUND: A collection of studies have demonstrated that approximately one-third of female nulliparous athletes experience urinary incontinence during their athletic activities. Contributing factors of incontinence that have thus far been the focus of study include type of sport, duration and intensity of athletic activity, use of hormonal contraception, and weight. There has, as yet, been a notable underemphasis on several other factors which influence incontinence, including bowel pattern, urinary habits, and menstrual status...
February 24, 2018: Journal of Pediatric Urology
Ditte Beck Jepsen, Jesper Ryg, Niklas Rye Jørgensen, Stinus Hansen, Tahir Masud
BACKGROUND: PaVOS is a randomized controlled trial (RCT) which aims to address the use of whole-body vibration exercise (WBV) in combination with parathyroid hormone 1-34 fragment teriparatide (PTH 1-34) treatment in patients with osteoporosis. PTH 1-34 is an effective but expensive anabolic treatment for osteoporosis. WBV has been found to stimulate muscle and bone growth. Animal studies have shown a beneficial effect on bone when combining PTH 1-34 with mechanical loading. A combined treatment with PTH 1-34 and WBV may potentially have beneficial effects on bone and muscles, and reduce fracture risk...
March 16, 2018: Trials
Eman Abdelfatah Mohamed Elhosary, Mahmoud Mohamed Ewidea, Hamada Ahmed Hamada Ahmed, Ayman El Khatib
[Purpose] To compare the effect of aerobic exercises versus laser acupuncture in treatment of postmenopausal hot flushes. [Subjects and Methods] This study was designed as single blind randomized controlled trial. A total of 48 postmenopausal women complained of hot flushes. Their ages ranged between 45 to 55 years and were randomly assigned into 2 equal groups: group (A), which received an aerobic exercises, and group (B), which received laser acupuncture. Both groups recieved 3 sessions per week for two months...
February 2018: Journal of Physical Therapy Science
Jinkyung Park, Darryn S Willoughby, Joon Jin Song, Brian C Leutholtz, Yunsuk Koh
Purpose: The current study examined the relationship between exercise-induced changes in stress hormones (epinephrine, norepinephrine, and cortisol) and vascular inflammatory markers (soluble intracellular adhesion molecule-1 [sICAM-1], soluble endothelial selectin [sE-selectin], and soluble vascular adhesion molecule-1 [sVCAM-1]) in obese men over a 24-hour period following exercise at lower and higher intensity. Patients and methods: Fifteen physically inactive, obese, college-aged men performed a single bout of cycling exercise at lower and higher intensities (lower intensity: 50% of maximal heart rate, and higher intensity: 80% of maximal heart rate) in random order...
2018: Journal of Inflammation Research
Tiffany Yang, Nu-Chu Liang
Physical inactivity and increased consumption of energy dense, high fat (HF) foods often leads to a state of positive energy balance. Regular exercise can facilitate the maintenance of a healthy body weight and mediate changes in dietary selection. Past studies using a two-diet choice (chow vs. HF) and voluntary wheel running paradigm found that when a novel HF diet and wheel running are simultaneously introduced, male rats show complete and persistent HF diet avoidance whereas the majority of females show HF diet avoidance for a few days, but then revert to HF diet preference...
March 9, 2018: Hormones and Behavior
Katie L Whytock, Sam O Shepherd, Anton J M Wagenmakers, Juliette A Strauss
Hormone-sensitive lipase (HSL) and adipose triglyceride lipase (ATGL) control skeletal muscle lipolysis. ATGL is present on the surface of lipid droplets (LD) containing intramuscular triglyceride (IMTG) in both the basal state and during exercise. HSL translocates to LD in ex vivo electrically stimulated rat skeletal muscle. Perilipin-2 and perilipin-5 associated lipid droplets (PLIN2+ and PLIN5+ LD) are preferentially depleted during exercise in humans indicating these PLINs may control muscle lipolysis. We aimed to test the hypothesis that in human skeletal muscle in vivo HSL (but not ATGL) is redistributed to PLIN2+ and PLIN5+ LD during moderate-intensity exercise...
March 11, 2018: Journal of Physiology
Susana Gonzalez, Thozhukat Sathyapalan, Zeeshan Javed, Stephen L Atkin
Objective: The aim of this study is to evaluate the effect of growth hormone therapy (rGH) on mitochondrial function on peripheral muscle and to correlate with exercise capacity in subjects with severe adult growth hormone deficiency (GHD). Design: Six months, double-blind, randomized, crossover, placebo-controlled trial of subcutaneous rGH in 17 patients with GHD. Measurements: Quadriceps muscle biopsies were obtained at baseline, 3 months, and 6 months to measure succinate dehydrogenase (SDH) to assess mitochondrial activity...
2018: Frontiers in Endocrinology
Nigel Harris, Andrew Kilding, Shivani Sethi, Fabrice Merien, Jinger Gottschall
OBJECTIVES: Given apparent consumer interest in calorie counting and arguably inadequate understanding of the differential effects of exercise modality despite equivalent caloric expenditure, we sought to quantify and compare the acute physiological responses within and between a BODYPUMP™ (BP) group-fitness class and steady-state cycling (CARDIO), matched for caloric cost (iso-caloric) and time (iso-time). DESIGN: Acute cross-over study design. METHODS: Twelve healthy recreationally active females (30...
March 2, 2018: Journal of Science and Medicine in Sport
Audrey J Gaskins, Rajeshwari Sundaram, Germaine M Buck Louis, Jorge E Chavarro
BACKGROUND: Little is known about the predictors of sexual intercourse frequency (SIF) among couples trying to conceive despite the well-established link between SIF and fecundity. AIM: To evaluate men's and women's demographic, occupational, and lifestyle predictors of SIF among couples. METHODS: 469 Couples without a history of infertility participating in the Longitudinal Investigation of Fertility and the Environment Study (2005-2009) were followed up for ≤1 year while trying to conceive...
March 6, 2018: Journal of Sexual Medicine
Anastassios Philippou, Maria Maridaki, Roxane Tenta, Michael Koutsilieris
OBJECTIVE: Mechanically overloaded muscle and its subsequent damage are strong stimuli for eliciting acute hormonal changes, while the muscle adaptation which occurs following exercise-induced muscle damage may involve complex hormonal responses before the completion of muscle regeneration. The purpose of this study was to investigate systemic responses of various hormones, as well as secreted proteins that are exercise-regulated and associated with muscle adaptation, for several days after eccentric exercise-induced muscle damage in humans...
October 2017: Hormones: International Journal of Endocrinology and Metabolism
Vitor Barreto Paravidino, Mauro Felippe Felix Mediano, Inácio Crochemore M Silva, Andrea Wendt, Fabrício Boscolo Del Vecchio, Fabiana Alves Neves, Bruno de Souza Terra, Erika Alvarenga Corrêa Gomes, Anibal Sanchez Moura, Rosely Sichieri
BACKGROUND: Physical exercise interventions have been extensively advocated for the treatment of obesity; however, clinical trials evaluating the effectiveness of exercise interventions on weight control show controversial results. Compensatory mechanisms through a decrease in energy expenditure and/or an increase in caloric consumption is a possible explanation. Several physiological mechanisms involved in the energy balance could explain compensatory mechanisms, but the influences of physical exercise on these adjustments are still unclear...
March 7, 2018: Trials
Angelita José Henrique, Maria Cristina Gabrielloni, Patricia Rodney, Márcia Barbieri
AIM: This study aimed to investigate the effect of warm shower hydrotherapy and perineal exercises with a ball on pain, anxiety, and neuroendocrine stress parameters during childbirth. METHODS: This randomized controlled trial was conducted with 128 women during childbirth, admitted for hospital birth in São Paulo, Brazil, from June 2013 to February 2014. The participants were randomly assigned into one of the following intervention groups: received warm shower hydrotherapy (GA); performed perineal exercises with a ball (GB); and combined intervention group, which received warm shower hydrotherapy and perineal exercises with a ball (GC) (n = 39)...
March 7, 2018: International Journal of Nursing Practice
Brian D Adams, Hannah Arem, Monica J Hubal, Brenda Cartmel, Fangyong Li, Maura Harrigan, Tara Sanft, Christopher J Cheng, Lajos Pusztai, Melinda L Irwin
PURPOSE: Obesity and weight gain are associated with comorbidities including a higher risk of tumor recurrence and cancer-related deaths among breast cancer (BC) survivors; however, the underlying mechanisms linking obesity and cancer are poorly understood. Given the lack of clinically validated BC biomarkers, obesity and weight-loss studies utilize serum biomarkers as the intermediary outcomes of tumor recurrence. Studies have indicated microRNAs (miRNA)s are reliable biomarkers for cancer...
March 6, 2018: Breast Cancer Research and Treatment
Edward L Melanson, Kate Lyden, Ellie Gibbons, Kathleen M Gavin, Pamela Wolfe, Margaret E Wierman, Robert S Schwartz, Wendy M Kohrt
PURPOSE: To determine the effects of 5 months of ovarian hormone suppression in pre-menopausal women on objectively measured physical activity (PA). METHODS: Participants (age = 35±8 yr; body mass index = 27±6 kgm) received monthly intramuscular injections of gonadotropin releasing hormone agonist therapy (GnRHAG) which suppresses pituitary gonadotropins and results in suppression of ovarian sex hormones. Women were randomized to receive concurrent transdermal E2 (GnRHAG+E2; n=30) or placebo (GnRHAG+PL, n=31)...
March 5, 2018: Medicine and Science in Sports and Exercise
Clinton G Lauritsen, Abigail L Chua, Stephanie J Nahas
PURPOSE OF REVIEW: Menopause is a life-changing event in numerous ways. Many women with migraine hold hope that the transition to the climacteric state will coincide with a cessation or improvement of migraine. This assumption is based mainly on common lay perceptions as well as assertions from many in the healthcare community. Unfortunately, evidence suggests this is far from the rule. Many women turn to a general practitioner or a headache specialist for prognosis and management. A natural instinct is to manipulate the offending agent, but in some cases, this approach backfires, or the concern for adverse events outweighs the desire for a therapeutic trial, and other strategies must be pursued...
March 6, 2018: Current Treatment Options in Neurology
Zihong He, Tuomo Rankinen, Arthur S Leon, James S Skinner, André Tchernof, Claude Bouchard
BACKGROUND/OBJECTIVES: Plasma steroid hormone levels vary between men and women, but their associations with BMI and adiposity are controversial. Furthermore, little is known about the role of exercise programs on the relationship between steroid hormones and adiposity. This report evaluates these relationships for plasma levels of adrenal, gonadal, and conjugated steroids with body composition and fat distribution in sedentary men and women, aged 17-65 years, and their responses to an exercise program...
March 5, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
Abdulkerim Kasım Baltaci, Rasim Mogulkoc
Background Melatonin, an important neurohormone released from the pineal gland, is generally accepted to exercise an inhibitor effect on the thyroid gland. Zinc mediates the effects of many hormones and is found in the structure of numerous hormone receptors. Aim The present study aims to examine the effect of melatonin supplementation and pinealectomy on leptin, neuropeptide Y (NPY), melatonin and zinc levels in rats with hypothyroidism and hyperthyroidism. Methods This study was performed on the 70 male rats...
March 2, 2018: Hormone Molecular Biology and Clinical Investigation
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