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https://www.readbyqxmd.com/read/28729707/status-stress-and-performance-in-track-and-field-athletes-during-the-european-games-in-baku-azerbaijan
#1
Benjamin Siart, Alfred Nimmerichter, Claudia Vidotto, Bernard Wallner
This study analyzes the relationship between salivary cortisol and testosterone levels and performance in track and field athletes. In addition, we analyzed the influence of status among athletes (measured based on previous athletic achievement) on hormone levels. Nineteen members of the Austrian track and field team (eleven males, eight females, 25.9 ± 3.9 years of age, 74.9 ± 20.1 kg, and 179.3 ± 10 cm) participated in this study. Data was collected during the European Games in Baku. Athletes delivered saliva samples at various time-points including morning samples and samples directly before and after the competition...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28692609/human-semen-quality-sperm-dna-damage-and-the-level-of-reproductive-hormones-in-relation-to-urinary-concentrations-of-parabens
#2
Joanna Jurewicz, Michał Radwan, Bartosz Wielgomas, Emila Dziewirska, Anetta Karwacka, Anna Klimowska, Paweł Kałużny, Paweł Radwan, Michał Bochenek, Wojciech Hanke
OBJECTIVE: The aim of this study was to evaluate the association between environmental exposure to parabens and semen quality parameters [main semen parameters, computer-aided semen analysis (CASA parameters], sperm chromatin structure, and the level of reproductive hormones in men [follicle-stimulating hormone (FSH), testosterone, estradiol]. METHODS: Urine samples collected from 315 men who attended the infertility clinic for diagnostic purposes with normal semen concentration of 15 to 300 mln/mL were analyzed for five parabens concentrations using a validated gas chromatography ion-tap mass spectrometry method...
July 7, 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28679314/pre-treatment-of-different-biological-matrices-for-exogenous-testosterone-analysis-a-review
#3
Edna Carolina Pizzato, Marcelo Filonzi, Hemerson Silva da Rosa, André Valle de Bairros
Exogenous testosterone presence has been monitored mainly in urine and blood, however other biological matrices such as hair, nails and saliva samples can be used with successful for in vivo measurement. Chromatographic analysis requires pre-treatment to obtain free testosterone and its metabolites. Among the pre-treatment procedures, digestion, hydrolysis and solvolysis steps are used to reach the analytical purpose. Digestion assay is indicated for hair and nails samples. First, it is recommended decontamination step...
July 5, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28661908/associations-between-hormonal-biomarkers-and-cognitive-motor-and-language-developmental-status-in-very-low-birth-weight-infants
#4
June Cho, Diane Holditch-Davis, Xiaogang Su, Vivien Phillips, Fred Biasini, Waldemar A Carlo
BACKGROUND: Male infants are more prone to health problems and developmental delays than female infants. OBJECTIVES: On the basis of theories of gender differences in brain development and social relationships, we explored associations between testosterone and cortisol levels with infant cognitive, motor, and language development ("infant development") in very low birth weight (VLBW) infants, controlling for mother-infant interactions, characteristics of mothers and infants, and days of saliva collection after birth...
June 28, 2017: Nursing Research
https://www.readbyqxmd.com/read/28659826/no-additional-benefits-of-block-over-evenly-distributed-high-intensity-interval-training-within-a-polarized-microcycle
#5
Kerry McGawley, Elisabeth Juudas, Zuzanna Kazior, Kristoffer Ström, Eva Blomstrand, Ola Hansson, Hans-Christer Holmberg
Introduction: The current study aimed to investigate the responses to block- versus evenly-distributed high-intensity interval training (HIT) within a polarized microcycle. Methods: Twenty well-trained junior cross-country skiers (10 males, age 17.6 ± 1.5 and 10 females, age 17.3 ± 1.5) completed two, 3-week periods of training (EVEN and BLOCK) in a randomized, crossover-design study. In EVEN, 3 HIT sessions (5 × 4-min of diagonal-stride roller-skiing) were completed at a maximal sustainable intensity each week while low-intensity training (LIT) was distributed evenly around the HIT...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28659579/sex-hormones-gonadotropins-and-sex-hormone-binding-globulin-in-infants-fed-breast-milk-cow-milk-formula-or-soy-formula
#6
Xin Fang, Lei Wang, Chunhua Wu, Huijing Shi, Zhijun Zhou, Scott Montgomery, Yang Cao
Measurement of endogenous hormones in early life is important to investigate the effects of hormonally active environmental compounds. To assess the possible hormonal effects of different feeding regimens in different sample matrices of infants, 166 infants were enrolled from two U.S hospitals between 2006 and 2009. The children were classified into exclusive soy formula, cow milk formula or breast milk regimens. Urine, saliva and blood samples were collected over the first 12 months of life. Estradiol, estrone, testosterone, luteinizing hormone (LH), follicle-stimulating hormone (FSH) and sex hormone-binding globulin (SHBG) levels were measured in the three matrices...
June 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28644096/comparisons-between-commercial-salivary-testosterone-enzyme-linked-immunosorbent-assay-kits
#7
Christoffer R Andersson, Jonas Bergquist, Elvar Theodorsson, Jakob O Ström
INTRODUCTION: Measuring testosterone concentrations is of interest both in clinical situations and for research, the latter expanding rapidly during recent years. An increased demand for convenient methods has prompted a number of companies to develop enzyme-linked immunosorbent assay (ELISA) kits to measure testosterone concentrations in saliva. However, the inter-comparability of kits from different manufacturers have yet to be determined. AIM OF STUDY: The aim of this study was to compare commercially available ELISA kits from four different manufacturers (Salimetrics, IBL, DRG and Demeditec)...
June 23, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28570489/possible-hormone-predictors-of-physical-performance-in-adolescent-team-sport-athletes
#8
Alanna C Martin, Ian T Heazlewood, Cecilia M Kitic, Isabelle Lys, Liam Johnson
The research aim of this study was to determine possible hormone predictors of physical performance in adolescent team sport athletes. Saliva samples were collected immediately prior to performance testing sessions from 114 state squad athletes (77 male, 37 female) participating in either Australian football, basketball, hockey, or netball. Participants completed tests of aerobic and anaerobic capacity, agility, power and speed. Samples were collected over 22 months at quarterly, six-monthly and/or yearly intervals depending on the testing schedule of the athlete...
May 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28528891/salivary-steroids-hormones-well-being-and-physical-performance-during-an-intensification-training-period-followed-by-a-tapering-period-in-youth-rhythmic-gymnasts
#9
Kizzy Antualpa, Marcelo Saldanha Aoki, Alexandre Moreira
This study examined the effect of an intensification period (IT; 4weeks; after a habitual training period; HT) followed by a tapering period (TP; 2weeks) on salivary hormones (testosterone - T and cortisol - C), well-being (WB), and physical performance in 23 rhythmic gymnasts (RG; Under-11 group [G1], Under-13 group [G2], and >13 group [G3]). The session-rating of perceived exertion was used to quantify the daily internal training load (ITL). The WB questionnaire was completed daily. Physical performance tests and saliva sampling were carried out at the beginning of the IT (T1), after IT (T2), and after TP (T3)...
May 18, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28527679/salivary-steroid-response-and-competitive-anxiety-in-elite-basketball-players-effect-of-opponent-level
#10
Ademir F S Arruda, Marcelo S Aoki, Ana Carolina Paludo, Alexandre Moreira
This study examined the effect of playing matches against different opponent teams (hard match; HM, medium match; MM, and easy match; EM) on pre-match testosterone concentration (T), pre-to-post match cortisol (C) concentration, and pre-competitive anxiety (CSAI-2 questionnaire) in 20 elite male basketball players. One training session (TS) was also assessed (control condition). Saliva steroids were determined by ELISA. The pre-T concentration was significantly lower for the TS (163±54pmolL(-1)), compared to the three official matches (EM: 208±82pmolL(-1), MM: 213±57pmolL(-1), and HM: 218±37pmolL(-1)) (p<0...
August 1, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28527589/competition-related-testosterone-cortisol-and-perceived-personal-success-in-recreational-women-athletes
#11
Kathleen V Casto, Aileen Rivell, David A Edwards
Thirty-five women participating in one or more intramural flag-football games provided saliva samples before, immediately after, and 10min after competition and completed an after-competition questionnaire appraising their own performance during the game. As seen in other studies of elite athletes, these recreational athletes, on average, showed significant elevations in testosterone (T) and cortisol (C) across the competition period - the "competition effect". In winners and losers, T levels at all time points measured were positively related to athletes' appraisals of their own individual performance...
May 26, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28511046/effects-of-stress-on-women-s-preference-for-male-facial-masculinity-and-their-endocrine-correlates
#12
Beate Ditzen, Simona Palm-Fischbacher, Lara Gossweiler, Livia Stucky, Ulrike Ehlert
Women's preferences for masculinity in men's faces seem to vary across the menstrual cycle and are assumed to be strongest around ovulation. A number of hormones have been proposed to underlie these subtle cyclic shifts. Furthermore, mating preferences are context-dependent, and stress has been found to alter mate choice, both in animals and humans. Currently, the effects of stress on women's preference for masculinity remain unknown. To examine the hormonal basis and the impact of stress on facial masculinity preference, we tested for within-subject changes in 52 healthy young women who underwent the Trier Social Stress Test (TSST) and the placebo-TSST in randomized order in the late follicular and mid-luteal phases of their menstrual cycle...
May 3, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28484379/testosterone-and-cortisol-jointly-predict-the-ambiguity-premium-in-an-ellsberg-urns-experiment
#13
Giuseppe Danese, Eugénia Fernandes, Neil V Watson, Samuele Zilioli
Previous literature has tried to establish whether and how steroid hormones are related to economic risk-taking. In this study, we investigate the relationship between testosterone (T) and cortisol (C) on one side and attitudes toward risk and ambiguity on the other. We asked 78 male undergraduate students to complete several tasks and provide two saliva samples. In the task "Reveal the Bag," participants expressed their beliefs on an ambiguous situation in an incentivized framework. In the task "Ellsberg Bags," we elicited from the participants through an incentive-compatible mechanism the reservation prices for a risky bet and an ambiguous bet...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28444531/multifaceted-sexual-desire-and-hormonal-associations-accounting-for-social-location-relationship-status-and-desire-target
#14
Sara B Chadwick, Shannon M Burke, Katherine L Goldey, Sari M van Anders
Sexual desire is typically measured as a unitary erotic phenomenon and is often assumed by biological and biomedical researchers, as well as the lay public, to be directly connected to physiological parameters like testosterone (T). In the present study, we empirically examined how conceptualizing sexual desire as multifaceted might clarify associations with T and contextual variables. To do so, we used the Sexual Desire Questionnaire (DESQ), which assesses multifaceted dyadic sexual desire, to explore how contextual variables such as social location, relationship status, and desire target (e...
April 25, 2017: Archives of Sexual Behavior
https://www.readbyqxmd.com/read/28428002/performance-during-competition-and-competition-outcome-in-relation-to-testosterone-and-cortisol-among-women
#15
Andrea Henry, Jason R Sattizahn, Greg J Norman, Sian L Beilock, Dario Maestripieri
A contribution to a special issue on Hormones and Human Competition. This study investigated the relation between competition, testosterone (T), and cortisol (C) in women. One hundred and twenty female participants competed against a male confederate in a computerized laboratory task. The task was preprogrammed so that half the women won and half of the women lost the competition. T and C concentrations were measured in saliva samples collected at four time points before and after the competition. Accuracy and reaction time during the competition were recorded...
May 23, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28413941/psychobiological-protective-factors-modifying-the-association-between-age-and-sexual-health-in-men-findings-from-the-men-s-health-40-study
#16
Andreas Walther, Fiona Mahler, Rudolf Debelak, Ulrike Ehlert
Sexual health severely decreases with age. For males older than 40 years, erectile dysfunction (ED) is the most common sexual disorder. Although physical and psychological risk factors for ED have been identified, protective factors are yet to be determined. To date, no study has examined endocrine and psychosocial factors in parallel with regard to their modifying effect on the age-related increase in ED. Two hundred and seventy-one self-reporting healthy men aged between 40 and 75 years provided both psychometric data on sexual function and a set of potential psychosocial protective factors, and saliva samples for the analysis of steroid hormones and proinflammatory cytokines...
May 2017: American Journal of Men's Health
https://www.readbyqxmd.com/read/28407517/social-status-strategy-in-early-adolescent-girls-testosterone-and-value-based-decision-making
#17
Stephanie L Cardoos, Ahna Ballonoff Suleiman, Megan Johnson, Wouter van den Bos, Stephen P Hinshaw, Ronald E Dahl
There has been strong interest, spanning several disciplines, in understanding adolescence as a developmental period of increased risk-taking behavior. Our goals focus on one line of investigation within this larger developmental risk framework. Specifically, we examined levels of pubertal hormones in girls in relation to their willingness to take greater financial risks to gain social status. To this end, we tested the hypothesis that higher levels of testosterone during the ages of pubertal maturation are associated with a greater willingness to sacrifice money for social admiration...
March 31, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28368782/yoga-stretching-for-improving-salivary-immune-function-and-mental-stress-in-middle-aged-and-older-adults
#18
Nobuhiko Eda, Hironaga Ito, Kazuhiro Shimizu, Satomi Suzuki, Eunjae Lee, Takao Akama
Protection against age-related immune suppression is important in elderly individuals. This study determined the effect of yoga on mucosal immune function and mental stress. Saliva samples were collected from 23 adult women (age: 60.4 ± 10.4 years) before and after 90 minutes of yoga stretching or rest to measure secretory immunoglobulin A (SIgA), cortisol, and testosterone. The SIgA concentration and secretion rate were significantly higher after yoga than before (p < .05). The cortisol concentration and secretion rate were lower and testosterone secretion rate higher after yoga (p < ...
April 3, 2017: Journal of Women & Aging
https://www.readbyqxmd.com/read/28365397/hormonal-underpinnings-of-status-conflict-testosterone-and-cortisol-are-related-to-decisions-and-satisfaction-in-the-hawk-dove-game
#19
Pranjal H Mehta, Nicole M Lawless DesJardins, Mark van Vugt, Robert A Josephs
A contribution to a special issue on Hormones and Human Competition.Testosterone is theorized to influence status-seeking behaviors such as social dominance and competitive behavior, but supporting evidence is mixed. The present study tested the roles of testosterone and cortisol in the hawk-dove game, a dyadic economic decision-making paradigm in which earnings depend on one's own and the other player's choices. If one person selects the hawk strategy and the other person selects the dove strategy, the player who selected hawk attains a greater financial pay-off (status differentiation)...
June 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28349036/monitoring-internal-training-load-and-salivary-immune-endocrine-responses-during-an-annual-judo-training-periodization
#20
Marcus F Agostinho, Alexandre Moreira, Ursula F Julio, Gilvan S Marcolino, Barbara M M Antunes, Fabio S Lira, Emerson Franchini
The objective of this study was to examine the internal training load (TL), IgA, and salivary steroid hormone responses in elite youth judo athletes during an entire annual training periodization. Ten male judo athletes (18±2 years, 72.3±12.3 kg, and 175±6 cm) competing at a state/national level were examined for the TL and salivary imune-endocrine responses variations over an annual judo season, divided in three macrocyles composed by distinct periods denominated preparatory period (PP), competitive period (CP) and transition period (TP)...
February 2017: Journal of Exercise Rehabilitation
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