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https://www.readbyqxmd.com/read/28526870/time-course-responses-of-circulating-micrornas-to-three-resistance-training-protocols-in-healthy-young-men
#1
Shufang Cui, Biao Sun, Xin Yin, Xia Guo, Dingming Chao, Chunni Zhang, Chen-Yu Zhang, Xi Chen, Jizheng Ma
Circulating microRNAs (c-miRNAs) in human plasma have been described as a potential marker of exercise. The present study investigated the effects of three acute resistance training (RT) protocols on the time-course changes of the c-miRNAs profiles in young males. The subjects (n = 45) were randomly divided into three groups: muscular strength endurance (SE), muscular hypertrophy (MH) and maximum strength (MS). Venous blood samples were obtained before exercise and immediately, 1 h and 24 h after each RT protocol to assess the following biological parameters: c-miRNAs, anabolic and catabolic hormones, inflammatory cytokines and muscle damage markers...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28525585/the-effects-of-gender-on-electrical-therapies-for-the-heart-physiology-epidemiology-and-access-to-therapies-a-report-from-the-xii-congress-of-the-italian-association-on-arrhythmology-and-cardiostimulation-aiac
#2
Giuseppe Boriani, Stefano Lorenzetti, Elisabetta Cerbai, Giuseppe Oreto, Gabriele Bronzetti, Vincenzo Livio Malavasi, Alessandro Biffi, Luigi Padeletti, Gianluca Botto, Igor Diemberger
The difference between men and women is clear even just by looking at an electrocardiogram: females present higher resting heart rate, a shorter QRS complex length and greater corrected QT interval. The development of these differences from pubertal age onward suggests that sexual hormones play a key role, although their effect is far from being completely understood. Different incidences between sexes have been reported for many arrhythmias, both ventricular and supraventricular, and also for sudden cardiac death...
May 19, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28524103/potential-impact-of-nutrition-on-immune-system-recovery-from-heavy-exertion-a-metabolomics-perspective
#3
REVIEW
David C Nieman, Susan Hazels Mitmesser
This review describes effective and ineffective immunonutrition support strategies for the athlete, with a focus on the benefits of carbohydrates and polyphenols as determined from metabolomics-based procedures. Athletes experience regular cycles of physiological stress accompanied by transient inflammation, oxidative stress, and immune perturbations, and there are increasing data indicating that these are sensitive to nutritional influences. The most effective nutritional countermeasures, especially when considered from a metabolomics perspective, include acute and chronic increases in dietary carbohydrate and polyphenols...
May 18, 2017: Nutrients
https://www.readbyqxmd.com/read/28515052/exercise-training-improves-free-testosterone-in-lifelong-sedentary-aging-men
#4
Lawrence Hayes, Peter Herbert, Nicholas Sculthorpe, Fergal Grace
As the impact of high intensity interval training (HIIT) on systemic hormones in aging men is unstudied to date, we investigated whether total testosterone (TT), sex hormone binding globulin (SHBG), free testosterone (free-T), and cortisol (all in serum) were altered following HIIT in a cohort of 22 lifelong sedentary (62 ± 2 years) older men. As HIIT requires preconditioning exercise in sedentary cohorts, participants were tested at three phases, each separated by six weeks' training; baseline (phase A), following conditioning exercise (phase B), and post-HIIT (phase C)...
May 17, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28514808/physiological-dynamic-apnea-responses-in-relation-to-apnea-capacity-in-triathletes
#5
Alexandre Guimard, Houssem Zorgati, Sylvain Brulaire, Virgile Amiot, Fabrice Prieur, Katia Collomp
The aim was to assess the cardiac, arterial oxygen saturation, lactate, hormonal and Borg rating of perceived exertion (RPE) responses to acute apnea in relation to apnea capacity in 18 middle-aged triathletes. Subjects were monitored while swimming two 50-m freestyle exercise trials with fins at maximal speed: with normal frequency breathing (NB) and with complete apnea (Ap); the latter was used to assess apnea capacity. The subjects with significant alteration in swimming performance inducing a time increase greater than 2...
May 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28514721/impact-of-gh-administration-on-athletic-performance-in-healthy-young-adults-a-systematic-review-and-meta-analysis-of-placebo-controlled-trials
#6
REVIEW
Kasper Hermansen, Mads Bengtsen, Michael Kjær, Peter Vestergaard, Jens Otto Lunde Jørgensen
OBJECTIVE: Illicit use of growth hormone (GH) as a performance-enhancing drug among athletes is prevalent, although the evidence of such effects in healthy, young subjects is sparse. We therefore performed a meta-analysis of published studies on the effect of GH administration on body composition, substrate metabolism, and athletic performance in healthy, young subjects. DESIGN: The English-language based databases PubMed, EMBASE, and Cochrane Central Register of Controlled Trials were searched, and eligible articles were reviewed in accordance with the PRISMA guidelines...
May 10, 2017: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/28512158/association-between-changes-in-fat-distribution-and-biomarkers-for-breast-cancer
#7
Willemijn A van Gemert, Evelyn Monninkhof, Anne M May, Sjoerd G Elias, Job van der Palen, Wouter Veldhuis, Maaike Stapper, Rebecca K Stellato, Jantina A Schuit, Petra H M Peeters
We assessed the associations between changes in total and abdominal fat and changes in biomarkers for breast cancer risk using data of the SHAPE-2 trial. In the SHAPE-2 trial, 243 postmenopausal overweight women were included. The intervention in this trial consisted of 5-6 kg weight loss either by diet only or exercise plus diet. After 16 weeks, we measured serum sex hormones, inflammatory markers, total body fat (measured by DEXA scan) and intra and subcutaneous abdominal fat (measured by MRI). Associations between changes in different body fat depots and biomarkers were analysed by linear regression using the study cohort irrespective of randomization in order to make maximal use of the distribution of changes in fat measures...
May 16, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28511457/leptin-as-a-predictive-marker-in-unexplained-infertility-in-north-indian-population
#8
Pratibha Kumari, S P Jaiswar, Pushplata Shankhwar, Sujata Deo, Kalim Ahmad, Bushra Iqbal, A A Mahdi
INTRODUCTION: According to WHO, the primary infertility in India is about 3.9% (age-standardized to 25-49 year) and 16.8% (age-standardized to 15-49 year), using the "age but no birth" definition. Several factors which affect fertility include low sperm production in men, poor egg quality and blocked fallopian tubes in women and also hormonal imbalances. Leptin plays a critical role in women's reproduction and neuroendocrine health. It is used for treating exercise-induced bone loss, eating disorders and infertility...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28505102/bone-protective-effects-of-dried-plum-in-postmenopausal-women-efficacy-and-possible-mechanisms
#9
REVIEW
Bahram H Arjmandi, Sarah A Johnson, Shirin Pourafshar, Negin Navaei, Kelli S George, Shirin Hooshmand, Sheau C Chai, Neda S Akhavan
Osteoporosis is an age-related chronic disease characterized by a loss of bone mass and quality, and is associated with an increased risk of fragility fractures. Postmenopausal women are at the greatest risk of developing osteoporosis due to the cessation in ovarian hormone production, which causes accelerated bone loss. As the demographic shifts to a more aged population, a growing number of postmenopausal women will be afflicted with osteoporosis. Certain lifestyle factors, including nutrition and exercise, are known to reduce the risk of developing osteoporosis and therefore play an important role in bone health...
May 14, 2017: Nutrients
https://www.readbyqxmd.com/read/28500399/childhood-and-teenage-physical-activity-and-breast-cancer-risk
#10
Nicole M Niehoff, Alexandra J White, Dale P Sandler
PURPOSE: Adult physical activity is associated with reduced breast cancer risk, but few studies have evaluated activity before adulthood. Early life may be an important period because of rapid breast development and hormonal changes. This study contributes new information by examining childhood (ages 5-12) and teenage (ages 13-19) activity separately and overall. METHODS: The Sister Study is a cohort of 50,884 women aged 35-74. Women reported age 5-19 sports/exercise activities and age 10 and 16 unstructured activities...
May 12, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28488831/reduced-leptin-level-is-independently-of-fat-mass-changes-and-hunger-scores-from-high-intensity-intermittent-plus-strength-training
#11
Daniela S Inoue, Valéria L Gonçalves Panissa, Barbara Mello Antunes, Flaviane Poleto de Oliveira, Raoni Bernardes Malta, Renan Santos Caldeira, Eduardo Zapaterra Campos, Gustavo Duarte Pimentel, Emerson Franchini, Fábio Santos Lira
BACKGROUND: This study aimed to analyze the effects of high-intensity intermittent training (HIIT) plus strength training on body composition, hormone related to energetic balance (leptin), and hunger scores in physically active non-obese men. METHODS: Sixteen men were allocated in two different groups, training group (n=10) performed a combined HIIT (5 km, 1 min of effort interspersed by 1 min of rest in passive recovery) followed by strength exercise session (three sets, with load of 8-12 repetition maximum) twice a week, during 8 weeks, while control group (n=6) did not suffer any intervention...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28488828/effects-of-active-recovery-during-interval-training-on-plasma-catecholamines-and-insulin
#12
Harutiun M Nalbandian, Zsolt Radak, Masaki Takeda
BACKGROUND: Active recovery has been used as a method to accelerate the recovery during intense exercise. It also has been shown to improve performance in subsequent exercises, but little is known about its acute effects on the hormonal and metabolic profile. The aim of this research was to study the effects of active recovery on plasma catecholamines and plasma insulin during a high-intensity interval exercise. METHODS: 7 subjects performed two high-intensity interval training protocols which consisted of three 30 s high-intensity bouts (constant intensity), separated by a recovery of 4 minutes...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28479951/acute-effects-of-24-h-sleep-deprivation-on-salivary-cortisol-and-testosterone-concentrations-and-testosterone-to-cortisol-ratio-following-supplementation-with-caffeine-or-placebo
#13
Ciaran Mc Donald, Joss Moore, Alan McIntyre, Kevin Carmody, Bernard Donne
Caffeine has become a popular ergogenic aid amongst athletes and usage to improve athletic performance has been well documented. The effect of caffeine on anabolic and catabolic hormones in a sleep-deprived s tate has had little investigation to date. The purpose of the current study was to investigate the potential of caffeine to offset the effects, if any, of short-term sleep deprivation and exercise on an athlete's testosterone and cortisol concentrations via salivary technique. Eleven competitive male athletes volunteered to be part of this prospective double-blinded study...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28479755/the-effect-of-moderate-physical-activity-on-ovarian-reserve-markers-in-reproductive-age-women-below-and-above-30-years
#14
Donthu Kiranmayee, Talla Praveena, Yalamanchali Himabindu, Manne Sriharibabu, Kothapalli Kavya, Medapati Mahalakshmi
BACKGROUND: There is significant evidence among the general population regarding the impact of physical activity in improving the quality of life; however, evidence regarding the effect of physical activity in improving fertility and the quality of life in infertile women is inadequate. Existing medical literature shows that moderately regular physical activity positively influences ovarian reserve and assisted reproductive technology (ART) outcomes in overweight and obese women. It is not known whether moderate physical activity influences ovarian reserve in normal weight reproductive age women, and whether age has any influence on the physical activity related changes in ovarian reserve...
January 2017: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/28479016/the-impact-of-rate-of-weight-loss-on-body-composition-and-compensatory-mechanisms-during-weight-reduction-a-randomized-control-trial
#15
Sílvia Ribeiro Coutinho, Emilie With, Jens F Rehfeld, Bård Kulseng, Helen Truby, Cátia Martins
BACKGROUND & AIMS: Rapid weight loss (WL) has been associated with a larger loss of fat free mass and a disproportional reduction in resting metabolic rate (RMR), but the evidence is inconclusive. We aimed to evaluate the impact of WL rate on body composition and compensatory mechanisms activated with WL (reduced RMR, increased exercise efficiency (ExEff) and appetite), both during negative and neutral energy balance (EB). METHODS: Thirty-five participants with obesity were randomized to lose a similar weight rapidly (4 weeks) or gradually (8 weeks), and afterwards to maintain it (4 weeks)...
April 25, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28474561/hormones-and-sarcopenia
#16
John E Morley
Sarcopenia is defined as the loss of muscle mass associated with a loss of muscle function, e.g., walking speed. A number of consensus definitions exist for sarcopenia with cut-off points being ethnically specific. A rapid screen test (SARC-F) is available and does not require different ethnic cut-off points. Sarcopenia leads to the development of frailty, disability and mortality. The prevalence of sarcopenia varies from 1-29% in community-dwelling and 14 to 33% in long-term care populations. Hormones play a role in the development of muscle mass and in the regulation of muscle strength...
November 23, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28470410/the-presence-of-symptoms-of-testosterone-deficiency-in-the-exercise-hypogonadal-male-condition-and-the-role-of-nutrition
#17
David R Hooper, William J Kraemer, Catherine Saenz, Kevin E Schill, Brian C Focht, Jeff S Volek, Carl M Maresh
PURPOSE: High volumes of aerobic exercise have been associated with reduced testosterone (T), known as the exercise-hypogonadal male condition (EHMC). Although the presence of low T has been identified, few studies have assessed the presence of androgen-deficient symptoms. The purpose of this investigation is to assess men exhibiting EHMC and evaluate their hypothalamic-pituitary-gonadal axis, the presence of hypogonadal symptoms, and also investigate a possible contribution of inadequate nutrition to the condition...
May 3, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28462693/sarcopenia-in-patients-with-advanced-liver-disease
#18
Francesca Romana Ponziani, Antonio Gasbarrini
Sarcopenia is the loss of muscle mass and function, affecting up to 70% of patients with advanced liver disease. Liver cirrhosis is characterized by an altered glucose metabolism, lipid oxidation, ketogenesis and protein catabolism, leading to the loss of adipose and muscle tissue. The gastrointestinal dysfunction of cirrhotic patients results in inadequate nutrients intake and is responsible for muscle weakness thus limiting physical exercise and perpetuating the reduction of muscle mass. Recently, alterations of hormonal pathways involved in muscle growth, increased intestinal permeability and changes in the gut microbiota composition have been reported in cirrhotic patients...
April 28, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28459358/oral-contraceptive-use-for-manipulation-of-menstruation-in-young-physically-active-women
#19
Mia A Schaumberg, Lynne M Emmerton, David G Jenkins, Nicola W Burton, Xanne Ak Janse de Jonge, Tina L Skinner
PURPOSE: Menstruation and menstrual symptoms are commonly-cited barriers to physical activity in women. The delay or avoidance of menstruation through extended oral contraceptive regimens may mitigate these barriers, yet information on menstrual manipulation practices in young physically-active women is sparse. The objective of this study was to investigate prevalence of, and reasons for, menstrual manipulation with oral contraceptives in recreationally- and competitively- active women...
May 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28456765/the-skeletal-and-heart-muscle-triacylglycerol-lipolysis-revisited
#20
M Knapp, J Gorski
For 40 years, the enzyme hormone sensitive lipase was considered to hydrolyze the first ester bond of the triacylglycerol moiety and thus initiate hydrolysis. However, 12 years ago a new lipolytic enzyme, termed adipose triglyceride lipase was discovered. It was further shown that the process of lipolysis of triacylglycerol to diacylglycerol and fatty acid is initiated by adipose triglyceride lipase and not by hormone sensitive lipase, responsible for hydrolysis of diacylglycerol to monoacyglycerol and fatty acid...
February 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
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