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Dubin JM, Aguiar JA, Lin JS, Greenberg DR, Keeter MK, Fantus RJ, Pham MN, Hudnall MT, Bennett NE, Brannigan RE, Halpern JA. The broad reach and inaccuracy of men's health information on social media: analysis of TikTok and Instagram. Int J Impot Res 2024; 36:256-260. [PMID: 36402921 PMCID: PMC9676765 DOI: 10.1038/s41443-022-00645-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 11/07/2022] [Accepted: 11/11/2022] [Indexed: 11/21/2022]
Abstract
Social media (SoMe) offers great potential to expand access to health information, but a significant proportion of users consume its content instead of consulting a physician. We sought to quantify the volume and characterize the accuracy of men's health-related content on TikTok and Instagram. We searched TikTok and Instagram for the terms: testosterone, erectile dysfunction, male infertility, semen retention, Peyronie's disease, and vasectomy. The top 10 hashtags for each term were used to estimate the total impressions for each term on each platform, and posts were then characterized by creator type, content type, and accuracy (1 to 5 scale). TikTok had 2,312,407,100 impressions and Instagram had 3,107,300 posts across all topics. Semen retention had the most impressions on TikTok (1,216,074,000) and posts on Instagram (1,077,000). Physicians created only a small portion of total TikTok and Instagram posts (10.3% and 12.9%, respectively). Across all topics, the accuracy of content was poor (2.6 ± 1.7), however, physician posts were more accurate than non-physician posts (mean 4.2 ± 1.2 vs 2.3 ± 1.6, p < 0.001, respectively). Men's health content is popular on TikTok and Instagram but is not accurate. We recommend that physicians actively engage in SoMe to address misinformation.
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Affiliation(s)
- Justin M Dubin
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
| | - Jonathan A Aguiar
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Jasmine S Lin
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | - Mary Kate Keeter
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Richard J Fantus
- Division of Urology, Department of Surgery, Northshore University Health System, Evanston, IL, USA
| | - Minh N Pham
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Matthew T Hudnall
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Nelson E Bennett
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | - Joshua A Halpern
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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2
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Isenmann E, Schumann M, Notbohm HL, Flenker U, Zimmer P. Hormonal response after masturbation in young healthy men - a randomized controlled cross-over pilot study. Basic Clin Androl 2021; 31:32. [PMID: 34937544 PMCID: PMC8697462 DOI: 10.1186/s12610-021-00148-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 09/24/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hormones like testosterone play a crucial role in performance enhancement and muscle growth. Therefore, various attempts to increase testosterone release and testosterone concentration have been made, especially in the context of resistance training. Among practitioners, sexual activity (coitus and masturbation) a few hours before training is often discussed to result in increases of testosterone concentration and thus promote muscle growth. However, there is no evidence to support this assumption and the kinetics of the testosterone and cortisol response after sexual activity have not been adequately investigated. Therefore, the aim of this pilot-study was to examine the kinetics of hormone concentrations of total testosterone, free testosterone and cortisol and their ratios after masturbation. In a three-arm single blinded cross-over study, the effects of masturbation with visual stimulus were compared to a visual stimulus without masturbation and the natural kinetics in healthy young men. RESULTS The results showed a significant between-condition difference in free testosterone concentrations. Masturbation (p < 0.01) and a visual stimulus (p < 0.05) may seem to counteract the circadian drop of free testosterone concentrations over the day. However, no statistical change was observed in the ratios between total testosterone, free testosterone and cortisol. CONCLUSIONS It can be assumed that masturbation may have a potential effect on free testosterone concentrations but not on hormonal ratios. However, additional studies with larger sample sizes are needed to validate these findings.
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Affiliation(s)
- Eduard Isenmann
- Department of Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany. .,Department of Fitness and Health, IST-University of Applied Sciences, Dusseldorf, Germany.
| | - Moritz Schumann
- Department of Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
| | - Hannah L Notbohm
- Department of Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
| | - Ulrich Flenker
- Department of Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
| | - Philipp Zimmer
- Department of 'Performance and Health (Sports Medicine)', Institute of Sport and Sport Science, Technical University Dortmund, Dortmund, Germany
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Mascherek A, Reidick MC, Gallinat J, Kühn S. Is Ejaculation Frequency in Men Related to General and Mental Health? Looking Back and Looking Forward. Front Psychol 2021; 12:693121. [PMID: 34434144 PMCID: PMC8382266 DOI: 10.3389/fpsyg.2021.693121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 07/19/2021] [Indexed: 11/13/2022] Open
Abstract
Despite its relevance for human sexuality, literature on potential effects of ejaculation frequency and masturbation on general and mental health outcomes is sparse. Reasons for this knowledge gap include a general lack of interest, but also methodological challenges and still existing superstition. This paper reconciles literature from various fields to extract relevant information on how ejaculation frequency effects general and mental health outcomes. Culture-bound syndromes have been reported in countries still strictly tabooing or condemning masturbation. Masturbatory guilt describes a phenomenon in individuals experiencing a discrepancy between moral standards and own behavior with respect to masturbation. Abstinence is one aspect under study in the area of fertility treatment. Specific time frames and their respective implications on quality of sperm remain inconclusive. Limited temporal resolution capacities hamper the precise study of brain structures directly activated during ejaculation. The relation between ejaculation frequency and hormonal influences remains poorly understood. Future research that specifically addresses ejaculation frequency and potential mental and general health outcomes is needed. In contrast to extracting knowledge as a byproduct from other studies with a different focus, this enables sound study designs and could provide evidence-based results which could then be further discussed and interpreted.
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Affiliation(s)
- Anna Mascherek
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Mirjam Christina Reidick
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jürgen Gallinat
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Simone Kühn
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Abbas AM, Fathy SK, Khamees AA, Salem AS, Ahmed L. A focused review on the genital and sexual affection of COVID-19 patients. J Gynecol Obstet Hum Reprod 2020; 49:101848. [PMID: 32619728 PMCID: PMC7326390 DOI: 10.1016/j.jogoh.2020.101848] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 06/26/2020] [Indexed: 02/05/2023]
Abstract
The pandemic of coronavirus disease-2019 (COVID-19) could harm the reproductive and sexual health of both males and females. This could be through psychological, immunological, or systemic effects. In this article, we tried to elucidate the mechanisms that could explain the current and future genital affection of COVID-19 patients.
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Affiliation(s)
- Ahmed M Abbas
- Department of Obstetrics & Gynecology, Faculty of Medicine, Assiut University, Egypt; COvid-19 Research of Assiut UNiversity Association (CORAUNA) Group, Egypt.
| | - Safaa K Fathy
- COvid-19 Research of Assiut UNiversity Association (CORAUNA) Group, Egypt; Faculty of Medicine, Assiut University, Egypt
| | - Areej A Khamees
- COvid-19 Research of Assiut UNiversity Association (CORAUNA) Group, Egypt; Faculty of Medicine, Assiut University, Egypt
| | - Amera S Salem
- COvid-19 Research of Assiut UNiversity Association (CORAUNA) Group, Egypt; Faculty of Medicine, Assiut University, Egypt
| | - Lobna Ahmed
- COvid-19 Research of Assiut UNiversity Association (CORAUNA) Group, Egypt; Faculty of Medicine, Assiut University, Egypt
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Zimmer F, Imhoff R. Abstinence from Masturbation and Hypersexuality. ARCHIVES OF SEXUAL BEHAVIOR 2020; 49:1333-1343. [PMID: 32130561 PMCID: PMC7145784 DOI: 10.1007/s10508-019-01623-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 11/19/2019] [Accepted: 12/28/2019] [Indexed: 05/04/2023]
Abstract
Despite the lack of evidence for negative health effects of masturbation, abstinence from masturbation is frequently recommended as a strategy to improve one's sexual self-regulation. We adopted a framework of perceived problems with pornography to collect first hints about whether abstinence from masturbation stems from a psychological and behavioral "addiction" or conflicting attitudes. In an online questionnaire survey recruited via a non-thematic Reddit thread (n = 1063), most participants reported that they had tried to be abstinent from masturbation. As visible from zero-order correlations and multiple linear regression, motivation for abstinence was mostly associated with attitudinal correlates, specifically the perception of masturbation as unhealthy. While there were associations with hypersexuality, no significant correlation with behavioral markers such as maximum number of orgasms was found. Higher abstinence motivation was related to a higher perceived impact of masturbation, conservatism, and religiosity and to lower trust in science. We argue that research on abstinence from masturbation can enrich the understanding of whether and how average frequencies of healthy behavior are pathologized.
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Affiliation(s)
- Felix Zimmer
- Social and Legal Psychology, Department of Psychology, Johannes Gutenberg University Mainz, Binger Str. 14-16, 55122, Mainz, Germany.
| | - Roland Imhoff
- Social and Legal Psychology, Department of Psychology, Johannes Gutenberg University Mainz, Binger Str. 14-16, 55122, Mainz, Germany
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Oshakbayev K, Bimbetov B, Manekenova K, Bedelbayeva G, Mustafin K, Dukenbayeva B. Severe nonalcoholic steatohepatitis and type 2 diabetes: liver histology after weight loss therapy in a randomized clinical trial. Curr Med Res Opin 2019; 35:157-165. [PMID: 30431378 DOI: 10.1080/03007995.2018.1547696] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE To evaluate the effectiveness of the fast weight loss method on liver steatosis, fibrosis, inflammation, glycemic and lipid features and body composition in patients with severe nonalcoholic steatohepatitis (NASH) and type 2 diabetes (T2D). METHODS A 24 week open prospective randomized controlled clinical trial including 80 adult patients (aged 40-65 years) was performed. The patients after randomization were divided into two groups: the main group followed the fast weight loss method; the control group received conventional drug treatment. The fast weight loss method included calorie restriction, salt intake, walking and sexual self-restraint. The conventional drug therapy included vitamin E, orlistat, pioglitazone hydrochloride, atorvastatin, lisinopril, benzodiazepines and anti-inflammatory agents. Primary endpoints were: ultrasound and histology suggestive of steatohepatitis, hepatic enzymes, weight loss, 2 hour oral glucose tolerance test and glycosylated hemoglobin A1C (HbA1c). Secondary endpoints were: blood pressure and lipids. RESULTS A total of 83% patients completed the study. In the main group weight lost was 7-16 kg (10-20% from baseline) for 8-10 weeks. In this group weight was lost due to reduction of fat mass only. The main vs. control group showed higher decrease in fat mass from baseline (p < .001). Ultrasound imaging and liver histological scoring system evidenced significant improvement in liver steatosis/fibrosis in the main group (p < .001). In the main vs. control group weight lost at 24 weeks led to positive laboratory changes in alanine aminotransferase (ALT), aspartate aminotransferase (AST), 2 hour oral glucose tolerance test (OGTT), HbA1c, Homeostasis Model Assessment insulin resistance indexes (HOMA-IR), blood pressure (BP), cholesterol, triglycerides, bilirubin total and blood hemoglobin (p = .01). The fast weight loss in the patients adequately led to decrease in symptomatic drugs up to complete abolition. CONCLUSIONS The study showed benefits of the fast weight loss method improving in steatosis/fibrosis and biochemical/metabolic outcomes in patients with severe NASH and T2D.
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Affiliation(s)
- Kuat Oshakbayev
- a Metabolic Syndrome Department , Nazarbayev University Medical Center, "ANADETO" medical center , Astana , Kazakhstan
| | - Bakytzhan Bimbetov
- b Gastroenterology and Hepatology Department , Nazarbayev University Medical Center , Astana , Kazakhstan
| | | | - Gulnara Bedelbayeva
- d Faculty of Postgraduate Education , Kazakh National Medical University named Asfendiarov , Almaty , Kazakhstan
| | - Khalit Mustafin
- e Department of Surgery , National Center for Neurosurgery , Astana , Kazakhstan
| | - Bibazhar Dukenbayeva
- f Faculty of Pathology and Forensic Medicine , Medical University Astana, "ANADETO" medical center , Astana , Kazakhstan
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Ayad BM, Horst GVD, Plessis SSD. Revisiting The Relationship between The Ejaculatory Abstinence Period and Semen Characteristics. INTERNATIONAL JOURNAL OF FERTILITY & STERILITY 2017; 11:238-246. [PMID: 29043697 PMCID: PMC5641453 DOI: 10.22074/ijfs.2018.5192] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 03/17/2017] [Indexed: 11/04/2022]
Abstract
Variation in the ejaculatory abstinence period suggested by different guidance bodies have resulted in a growing concern among researchers and clinicians over what the precise period of ejaculatory abstinence ought to be for an optimal semen sample. Several studies have thus been undertaken to examine the association between the length of sexual abstinence and semen characteristics. Not all studies, however, have arrived at the same conclusions. This study aims to review all existing literature published during the past few decades pertaining to the influence of ejaculatory abstinence on semen quality. For the purpose of this systematic review, all data related to sexual abstinence duration and seminal parameters were re-analysed to homogenize the current data. Thorough PubMed, MEDLINE and Google Scholar, a literature search was conducted using the keywords "sexual abstinence", "ejaculatory abstinence", "semen", "spermatozoa", "semen analysis", "sperm parameters", "motility", "reactive oxygen species (ROS)" and "DNA fragmentation". After carefully reviewing all the literature, 30 relevant papers, both written in English and published between January 1979 and December 2016, were included in this review. The weight of the evidence suggests that the decline in semen volume and sperm concentration with shorter abstinence periods is accompanied by a substantial improvement in sperm motility characteristics, especially progressive motility and velocity. Nevertheless, available data are insufficient to support definitive conclusions regarding the influence of the ejaculatory abstinence period on advanced semen parameters (ROS, DNA fragmentation and seminal plasma antioxidant capacity) and pregnancy rates. In conclusion, taking all data into account, shortening of the abstinence period may be beneficial to sperm quality. Furthermore, we recommend that the current guidelines regarding the prescribed abstinence period should be revisited.
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Affiliation(s)
- Bashir M Ayad
- Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Gerhard Van der Horst
- Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Stefan S Du Plessis
- Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa.
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8
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Holmboe SA, Priskorn L, Jørgensen N, Skakkebaek NE, Linneberg A, Juul A, Andersson AM. Influence of marital status on testosterone levels-A ten year follow-up of 1113 men. Psychoneuroendocrinology 2017; 80:155-161. [PMID: 28376340 DOI: 10.1016/j.psyneuen.2017.03.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 03/06/2017] [Accepted: 03/08/2017] [Indexed: 01/23/2023]
Abstract
Based on a large population of 1113 men aged 30-60 at baseline (mean: 44.1 years, standard deviation: 10.5), we investigated whether intra-individual changes in testosterone (T) and related reproductive hormones during a ten year period were dependent of marital status at baseline and follow-up. The studied men were part of a health survey in Denmark, conducted between 1982 and 1984 with a follow-up examination approximately ten years later. Data on reproductive hormones, measured in serum, and lifestyle and marital status were obtained at both time points. As expected, an age-related decline in testosterone was observed. However, independent of age and lifestyle, we observed that men who went from unmarried to married (n=81) during the study period experienced an accelerated age-related decline in testosterone (-6.6nmol/L) whereas men who went from married to unmarried (n=67) experienced an attenuated age-related decline (-2.3nmol/L). Men who were either married or unmarried at both time points (n=167, n=798, respectively) had a testosterone decline in between (-3.7nmol/L and -4.6nmol/L, respectively). Changes in T/LH ratio did not differ according to marital status indicating that the lowered T level is not compensated by increasing LH levels. This could suggest a modification of the gonadostat due to an adaptation to changing life circumstances.
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Affiliation(s)
- Stine A Holmboe
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Denmark; International Research and Research Training Centre in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen, Denmark.
| | - Lærke Priskorn
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Denmark; International Research and Research Training Centre in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen, Denmark
| | - Niels Jørgensen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Denmark; International Research and Research Training Centre in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen, Denmark
| | - Niels E Skakkebaek
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Denmark; International Research and Research Training Centre in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen, Denmark
| | - Allan Linneberg
- Research Centre for Prevention and Health, Rigshospitalet-Glostrup, Denmark; Department of Clinical Experimental Research, Rigshospitalet, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Anders Juul
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Denmark; International Research and Research Training Centre in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Anna-Maria Andersson
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Denmark; International Research and Research Training Centre in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen, Denmark
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Oshakbayev K, Dukenbayeva B, Togizbayeva G, Durmanova A, Gazaliyeva M, Sabir A, Issa A, Idrisov A. Weight loss technology for people with treated type 2 diabetes: a randomized controlled trial. Nutr Metab (Lond) 2017; 14:11. [PMID: 28163748 PMCID: PMC5286692 DOI: 10.1186/s12986-017-0163-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 01/21/2017] [Indexed: 01/13/2023] Open
Abstract
Background The prevalence of type 2 diabetes is increasing in worldwide despite the development of new treatment methods. Aim of the study was to evaluate a weight loss method on body composition, glycemic, lipid and hormone profiles, blood pressure and reactive oxygen species in people with treated type 2 diabetes. Methods A 24-week open, prospective, randomized, controlled clinical trial including 272 adult patients with treated type 2 diabetes was performed. The patients were divided in two groups: Main group consisted of 208 patients who followed a method including a calorie restriction diet and optimal physical activity; Control included 64 patients who received conventional drug treatment with weight loss. Main Outcome Measures were weight loss, fasting glucose and 2-hour oral glucose tolerance test (OGTT), HbA1c. Secondary endpoints were blood pressure, lipid and insulin blood levels. Results At 24 weeks, patients in Main weight lost between 8-18 kg (10–21%); their body mass index significantly decreased (-4.2 kg/m2) as well as their waist circumference (-13 cm) compared to Control. In Main weight loss was achieved fatty mass reduction. In Main fasting glucose and OGTT, HbA1c, blood pressure, reactive oxygen species decreased significantly, whereas hemoglobin levels and heel bone mineral density increased. In Main blood insulin levels decreased by 72.0%, cortisol levels decreased by 40.7%, while testosterone levels in men increased by 2.4 times from baseline. The application of the weight loss method led to a decrease in drug doses leading to their complete withdrawal. Conclusions The results of this study show the beneficial role of a weight loss method in improving glycemic, lipid and hormone profiles, electrolyte and biochemical indices, blood pressure, reactive oxygen species and bone mineral density in patients with treated type 2 diabetes. Trial registration ClinicalTrials.gov Identifier: NCT02503865. Retrospectively registered November 2015.
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Affiliation(s)
- Kuat Oshakbayev
- Metabolic Syndrome Department, Nazarbayev University Medical Center, Street Baitursynuly, 5, fl. 601, 010000 Astana, Kazakhstan
| | - Bibazhar Dukenbayeva
- Faculty of Pathology and Forensic Medicine, Medical University Astana, Astana, Kazakhstan
| | | | - Aigul Durmanova
- Department of Endocrinology, Republican Diagnostic Center at Nazarbayev University Medical Center, Astana, Kazakhstan
| | - Meruyert Gazaliyeva
- Faculty of Internal Medicine, Karaganda State Medical University, Karaganda, Kazakhstan
| | - Abdul Sabir
- Neurodevelopmental Services, Richmond Healthcare Civic Centre, Twickenham, London UK
| | - Aliya Issa
- Department of Endocrinology, National Scientific Cardiac Surgery Center, Astana, Kazakhstan
| | - Alisher Idrisov
- Department of Endocrinology, Medical University Astana, Astana, Kazakhstan
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Albrizio M, Siniscalchi M, Sasso R, Quaranta A. Effects of the environment on dog semen parameters and testosterone concentration. Theriogenology 2013; 80:800-4. [DOI: 10.1016/j.theriogenology.2013.07.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 07/03/2013] [Accepted: 07/06/2013] [Indexed: 11/25/2022]
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Møllerløkken OJ, Moen BE, Baste V, Magerøy N, Oftedal G, Neto E, Ersland L, Bjørge L, Torjesen PA, Mild KH. No effects of MRI scan on male reproduction hormones. Reprod Toxicol 2012; 34:133-9. [DOI: 10.1016/j.reprotox.2012.04.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 03/30/2012] [Accepted: 04/12/2012] [Indexed: 11/28/2022]
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12
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Hamilton LD, Meston CM. The effects of partner togetherness on salivary testosterone in women in long distance relationships. Horm Behav 2010; 57:198-202. [PMID: 19900454 PMCID: PMC2815233 DOI: 10.1016/j.yhbeh.2009.10.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Revised: 10/29/2009] [Accepted: 10/30/2009] [Indexed: 01/01/2023]
Abstract
The present study examined whether women's testosterone levels are influenced by being with a sexual and romantic partner after a period of sexual abstinence. Women in long distance relationships (n=15) provided five saliva samples: at least 1 week before seeing their partner (and at least 2 weeks since their last visit), the day before seeing their partner, when they were with their partner but prior to engaging in sexual activity, the day after their first sexual activity, and 3 days after they were separated from their partners. Salivary testosterone was lowest when participants had been away from their partners for at least 2 weeks and highest the day before they were to see their partners and the day after sexual activity. Results from this study indicated that women's testosterone increased both the day before they were with their partners and they day after they first engaged in sexual activity. However, something about initially reuniting with their partners returned their testosterone to baseline levels, which may be an effect of being in the same location as a partner, or just a state fluctuation due to nervousness or other psychological state.
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Affiliation(s)
- Lisa Dawn Hamilton
- Department of Psychology, University of Texas at Austin, Austin, TX 78712, USA.
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Kuepper Y, Hennig J. Behavioral Aggression Is Associated with the 2D:4D Ratio in Men but Not in Women. JOURNAL OF INDIVIDUAL DIFFERENCES 2007. [DOI: 10.1027/1614-0001.28.2.64] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract. Numerous studies have investigated the relationship between testosterone (T) and aggression but yielded inconsistent findings in healthy subjects. One possible reason for this might be the measurement of actual T-levels, ignoring that its role in neurodevelopment seems to be of predominant importance. The aim of our study was to further elucidate the effects of T availability during early phases of gestation, operationalized by the measurement of the 2nd to 4th digit ratio (2D:4D), on behavioral aggression in healthy volunteers. A low 2D:4D (indicating a long ring finger relative to the index finger) relates to high levels of prenatal T. A total number of 171 healthy subjects (98 men, 73 women) ranging in age from 20 to 30 years were tested. Participants were subjected to a modified version of a competitive reaction-time task, a commonly used and well-established tool to elicit and measure aggression (Taylor paradigm). They also completed self-report scales on trait aggression. Ventral surface scans of both hands were used to determine the 2D:4D ratio. As expected, the 2D:4D was lower in men as compared to women for both hands. Moreover, in contrast to questionnaire data, men reveal higher levels of aggression in the computer task compared to women. Finally, a negative correlation between 2D:4D and aggression was found in males but not in females. Results are discussed with respect to the usefulness of the 2D:4D construct as well as to sex differences in organizational effects of T.
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Affiliation(s)
- Yvonne Kuepper
- Department of Psychology, University of Giessen, Germany
| | - Jürgen Hennig
- Department of Psychology, University of Giessen, Germany
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14
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Sakaguchi K, Oki M, Honma S, Uehara H, Hasegawa T. The lower salivary testosterone levels among unmarried and married sexually active men. J ETHOL 2006. [DOI: 10.1007/s10164-006-0014-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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15
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James WH. A hypothesis on the sexual behaviour of men who are destined to develop prostate cancer. Int J Epidemiol 2004; 34:483-5. [PMID: 15231758 DOI: 10.1093/ije/dyh248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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