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https://www.readbyqxmd.com/read/28428002/performance-during-competition-and-competition-outcome-in-relation-to-testosterone-and-cortisol-among-women
#1
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...
April 17, 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
#2
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
#3
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
#4
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
#5
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)...
March 29, 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
#6
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
https://www.readbyqxmd.com/read/28295634/the-utility-of-salivary-testosterone-and-cortisol-concentration-measures-for-assessing-the-stress-responses-of-junior-athletes-during-a-sporting-competition
#7
Blair T Crewther, Zbigniew Obmiński, Joanna Orysiak, Emad A S Al-Dujaili
BACKGROUND: This study examined the utility of salivary testosterone (T) and cortisol (C) concentration measures for assessing the acute stress responses of junior athletes during a sporting competition. METHODS: Paired capillary blood and saliva samples were taken from 71 junior athletes (45 males, 26 females) before and after a simulated Olympic weightlifting competition. The concentration measures of salivary T and C were referenced against blood total T (TT) and C (TC) concentrations...
March 13, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28277426/effect-of-cold-water-immersion-performed-on-successive-days-on-physical-performance-muscle-damage-and-inflammatory-hormonal-and-oxidative-stress-markers-in-volleyball-players
#8
Victor H de Freitas, Solange P Ramos, Maurício G Bara-Filho, Daniel G S Freitas, Danilo R Coimbra, Rubens Cecchini, Flávia A Guarnier, Fábio Y Nakamura
The aim of this study was to investigate the effects of daily cold water immersion (CWI) on physical performance, muscle damage, and inflammatory, hormonal, and oxidative stress markers in volleyball. Six players were submitted to CWI and six players to a placebo, during 5 training days. Thigh circumference, squat jump, and agility were measured on the 1, 3 and 6 days. On the 1 and 6 days, blood and saliva were collected for analysis of oxidative stress, muscle damage, and inflammatory and hormonal levels. Muscle soreness and countermovement jump were quantified daily...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28266735/testosterone-in-human-studies-modest-associations-between-plasma-and-salivary-measurements
#9
A E de Wit, F J Bosker, E J Giltay, C S de Kloet, K Roelofs, J van Pelt, B W J H Penninx, R A Schoevers
Testosterone is involved in many processes like aggression and mood disorders. As it may easily diffuse from blood into saliva, salivary testosterone is thought to reflect plasma free testosterone level. If so, it would provide a welcome noninvasive and less stressful alternative to blood sampling. Past research did not reveal consensus regarding the strength of the association, but sample sizes were small. This study aimed to analyse the association in a large cohort. In total, 2,048 participants (age range 18-65 years; 696 males and 1,352 females) were included and saliva (using cotton Salivettes) and plasma were collected for testosterone measurements...
March 7, 2017: Andrologia
https://www.readbyqxmd.com/read/28186864/within-day-baseline-variation-in-salivary-biomarkers-in-healthy-men
#10
Firman Prathama Idris, Yunxia Wan, Xi Zhang, Chamindie Punyadeera
Saliva is an easily accessible sample and offers practical and noninvasive biomarker solutions as an alternative to blood and urine-based diagnostics. Saliva contains a plethora of biomolecules such as nucleic acids, hormones, proteins, and electrolytes. On the other hand, little is known on the extent to which the biomolecules in saliva vary over time within a given person. This baseline information is crucial for future development of robust saliva-based diagnostics. We have collected unstimulated whole mouth saliva from 20 healthy young men at four times during the day, including before and after a meal...
February 2017: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/28076306/parallel-diurnal-fluctuation-of-testosterone-androstenedione-dehydroepiandrosterone-and-17ohprogesterone-as-assessed-in-serum-and-saliva-validation-of-a-novel-liquid-chromatography-tandem-mass-spectrometry-method-for-salivary-steroid-profiling
#11
Marco Mezzullo, Alessia Fazzini, Alessandra Gambineri, Guido Di Dalmazi, Roberta Mazza, Carla Pelusi, Valentina Vicennati, Renato Pasquali, Uberto Pagotto, Flaminia Fanelli
BACKGROUND: Salivary androgen testing represents a valuable source of biological information. However, the proper measurement of such low levels is challenging for direct immunoassays, lacking adequate accuracy. In the last few years, many conflicting findings reporting low correlation with the serum counterparts have hampered the clinical application of salivary androgen testing. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) makes it possible to overcome previous analytical limits, providing new insights in endocrinology practice...
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28074406/testosterone-and-jamaican-fathers-exploring-links-to-relationship-dynamics-and-paternal-care
#12
Peter B Gray, Jody Reece, Charlene Coore-Desai, Twana Dinall, Sydonnie Pellington, Maureen Samms-Vaughan
This paper investigates relationships between men's testosterone and family life in a sample of approximately 350 Jamaican fathers of children 18-24 months of age. The study recognizes the role of testosterone as a proximate mechanism coordinating and reflecting male life history allocations within specific family and cultural contexts. A sample of Jamaican fathers and/or father figures reported to an assessment center for an interview based on a standardized questionnaire and provided a saliva sample for measuring testosterone level...
January 10, 2017: Human Nature: An Interdisciplinary Biosocial Perspective
https://www.readbyqxmd.com/read/28073108/salivary-testosterone-during-the-minipuberty-of-infancy%C3%A2
#13
Maria Contreras, Manish Raisingani, Donald Walt Chandler, William D Curtin, Julia Barillas, Preneet Cheema Brar, Kris Prasad, Bina Shah, Raphael David
BACKGROUND: The hypothalamic-pituitary-gonadal axis is transiently activated during the postnatal months in boys, a phenomenon termed "minipuberty" of infancy, when serum testosterone (T) increases to pubertal levels. Despite high circulating T there are no signs of virilization. We hypothesize that free T as measured in saliva is low, which would explain the absence of virilization. METHODS: We measured serum total T and free T in saliva using liquid chromatography-tandem mass spectrometry (LC-MS/MS) in 30 infant boys, aged 1-6 months, and in 12 adolescents, aged 11-17 years...
2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28039871/high-salivary-testosterone-to-androstenedione-ratio-and-adverse-metabolic-phenotypes-in-women-with-polycystic-ovary-syndrome
#14
J Münzker, L Lindheim, J Adaway, C Trummer, E Lerchbaum, T R Pieber, B Keevil, B Obermayer-Pietsch
BACKGROUND: Polycystic ovary syndrome (PCOS) is characterized by a combination of hormonal and metabolic disturbances, such as insulin resistance, glucose intolerance, anovulation and hyperandrogenism. Clinical phenotypes of PCOS show different patterns of steroid hormones that have been investigated to some extent. This study aimed to establish a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the quantification of salivary testosterone and androstenedione and to describe the salivary testosterone-to-androstenedione (T/A4) ratio as a new tool for the assessment of hyperandrogenism and metabolic health...
April 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/27989492/a-statistical-method-to-calculate-blood-contamination-in-the-measurement-of-salivary-hormones-in-healthy-women
#15
Guilherme A Behr, Jay P Patel, Marg Coote, Jose C F Moreira, Daniel P Gelain, Meir Steiner, Benicio N Frey
OBJECTIVES: Previous studies have reported that salivary concentrations of certain hormones correlate with their respective serum levels. However, most of these studies did not control for potential blood contamination in saliva. In the present study we developed a statistical method to test the amount of blood contamination that needs to be avoided in saliva samples for the following hormones: cortisol, estradiol, progesterone, testosterone and oxytocin. DESIGN & METHODS: Saliva and serum samples were collected from 38 healthy, medication-free women (mean age=33...
December 16, 2016: Clinical Biochemistry
https://www.readbyqxmd.com/read/27909455/salivary-testosterone-levels-under-psychological-stress-and-its-relationship-with-rumination-and-five-personality-traits-in-medical-students
#16
Reza Afrisham, Sahar Sadegh-Nejadi, Omid SoliemaniFar, Wesam Kooti, Damoon Ashtary-Larky, Fatima Alamiri, Mohammad Aberomand, Sedigheh Najjar-Asl, Ali Khaneh-Keshi
OBJECTIVE: The purpose of this study was to evaluate the salivary testosterone levels under psychological stress and its relationship with rumination and five personality traits in medical students. METHODS: A total of 58 medical students, who wanted to participate in the final exam, were selected by simple random sampling. Two months before the exam, in the basal conditions, the NEO Inventory short form, and the Emotional Control Questionnaire (ECQ) were completed...
November 2016: Psychiatry Investigation
https://www.readbyqxmd.com/read/27907037/reliability-of-potential-pain-biomarkers-in-the-saliva-of-healthy-subjects-inter-individual-differences-and-intersession-variability
#17
Eva M Sobas, Roberto Reinoso, Rubén Cuadrado-Asensio, Itziar Fernández, Miguel J Maldonado, José C Pastor
AIM: Salivary cortisol, α-amylase (sAA), secretory IgA (sIgA), testosterone, and soluble fraction of receptor II of TNFα (sTNFαRII) could serve as objective pain measures, but the normal variability of these potential biomarkers is unknown. PATIENTS & METHODS: Saliva was collected with the passive secretion method from 34, pain-free subjects in two single samples at least 24 hours apart. Biomarker variation and intersession reliability were assessed with the intraclass correlation coefficient (ICC)...
2016: PloS One
https://www.readbyqxmd.com/read/27891109/pulling-rank-military-rank-affects-hormone-levels-and-fairness-in-an-allocation-experiment
#18
Benjamin Siart, Lena S Pflüger, Bernard Wallner
Status within social hierarchies has great effects on the lives of socially organized mammals. Its effects on human behavior and related physiology, however, is relatively little studied. The present study investigated the impact of military rank on fairness and behavior in relation to salivary cortisol (C) and testosterone (T) levels in male soldiers. For this purpose 180 members of the Austrian Armed Forces belonging to two distinct rank groups participated in two variations of a computer-based guard duty allocation experiment...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27875569/are-men-s-perceptions-of-sexually-dimorphic-vocal-characteristics-related-to-their-testosterone-levels
#19
Michal Kandrik, Amanda C Hahn, Joanna Wincenciak, Claire I Fisher, Katarzyna Pisanski, David R Feinberg, Lisa M DeBruine, Benedict C Jones
Feminine physical characteristics in women are positively correlated with markers of their mate quality. Previous research on men's judgments of women's facial attractiveness suggests that men show stronger preferences for feminine characteristics in women's faces when their own testosterone levels are relatively high. Such results could reflect stronger preferences for high quality mates when mating motivation is strong and/or following success in male-male competition. Given these findings, the current study investigated whether a similar effect of testosterone occurs for men's preferences for feminine characteristics in women's voices...
2016: PloS One
https://www.readbyqxmd.com/read/27865788/testosterone-and-immune-reproductive-tradeoffs-in-healthy-women
#20
Tierney K Lorenz, Julia R Heiman, Gregory E Demas
Although testosterone (T) has been characterized as universally immunosuppressive across species and sexes, recent ecoimmunology research suggests that T's immunomodulatory effects (enhancing/suppressing) depend on the organism's reproductive context. Very little is known about the immune effects of T in healthy females, and even less about how reproductive effort modulates the immune effects of T in humans. We investigated how the interaction between endogenous T and sexual activity predicted menstrual cycle-related changes in several measures of immunity: inflammation (indexed by interleukin-6, IL-6), adaptive immunity (indexed by immunoglobulin A, IgA), and functional immunity (indexed by bactericidal assay)...
February 2017: Hormones and Behavior
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