commit b3df48707bf90fcb5aeee9d5b62e4589461021c0 Author: rocky129907159 Date: Thu Apr 2 17:38:59 2026 +0000 Add 'Safety and Efficacy of Testosterone Therapy on Musculoskeletal Health and Clinical Outcomes in Men: A Systematic Review and Meta-Analysis of Randomized Placebo-Controlled Trials' diff --git a/Safety-and-Efficacy-of-Testosterone-Therapy-on-Musculoskeletal-Health-and-Clinical-Outcomes-in-Men%3A-A-Systematic-Review-and-Meta-Analysis-of-Randomized-Placebo-Controlled-Trials.md b/Safety-and-Efficacy-of-Testosterone-Therapy-on-Musculoskeletal-Health-and-Clinical-Outcomes-in-Men%3A-A-Systematic-Review-and-Meta-Analysis-of-Randomized-Placebo-Controlled-Trials.md new file mode 100644 index 0000000..5a402c3 --- /dev/null +++ b/Safety-and-Efficacy-of-Testosterone-Therapy-on-Musculoskeletal-Health-and-Clinical-Outcomes-in-Men%3A-A-Systematic-Review-and-Meta-Analysis-of-Randomized-Placebo-Controlled-Trials.md @@ -0,0 +1,8 @@ +
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In 2D cultured Achilles tendon cells, Irie et al. (2010) found that estrogen or a selective estrogen receptor [https://gitea.biboer.cn/rosa0390277504](https://gitea.biboer.cn/rosa0390277504) modulator (SERM) increases the expression of MMP-13, suggesting that estrogen could increase the rate of collagen turnover. Interestingly, unlike native estrogen that decreases tendon stiffness, genistein showed no effect on mechanical properties of the Achilles (Ramos et al., 2012), suggesting that phytoestrogens produce the increase in collagen without the negative effect on stiffness. Together, these data suggest that in young active women, the incorporation of new collagen into the patellar tendon is lower and does not increase following exercise. Consistent with the stable isotope data from Hansen et al. (2009a), when the same group compared the data in men to an equivalent cohort of women, tendon collagen synthesis was 46% lower in the women at rest and was unaffected by exercise (Miller et al., [159.75.131.235](http://159.75.131.235:3001/ladonnastorkey) 2007). In contrast to the microdialysis experiment, [befamous.cyou](https://befamous.cyou/@fernhoch27661?page=about) OC use decreased resting collagen synthesis, and neither group saw an increase in collagen incorporation into the patellar tendon after exercise (Hansen et al., 2009a). There have been a number of elegant studies performed in women that have tried to establish the mechanism underlying the effect of estrogen on tendon health. +Since Myer et al. (2008) showed that for every 1.3 mm increase in knee displacement, risk of ACL injury goes up 4-fold, the rise in knee laxity reported by Deie, Park, and Shultz could explain the 2- to 8-fold higher rate of ACL rupture in women (Arendt and Dick, 1995; Adachi et al., 2008). A number of other studies have also addressed the role of estrogen replacement therapy on muscle mass and function (Taaffe et al., 2005; Hansen et al., 2012; Pingel et al., 2012; Smith et al., 2014). The lower fat mass could be a result of the correction of the lower LH/FSH ratio in postmenopausal women on HRT (Beydoun et al., 2012), or could be a metabolic consequence of the increase in muscle mass. In support of this hypothesis, when estrogen levels were raised to that of premenopausal women using estrogen replacement therapy (ERT), the response to anabolic stimuli was normalized (Hansen et al., 2012). Even though higher rates of protein turnover might be expected to improve muscle quality, these women still experience a rapid decrease in muscle mass and strength, and as a result are more vulnerable to age-related frailty (Hansen and Kjaer, 2014). +Additionally, [buy testosterone booster](https://adaptsmedia.info/optima/companies/cold-plunge-and-testosterone-what-studies-show/) supports muscle flexibility by enhancing the health of tendons and ligaments, which are the tissues that connect muscles to bones. [purchase testosterone](https://www.livecima.com/@gialack2899797?page=about) Replacement Therapy (TRT) has gained attention not only for its role in treating low [purchase testosterone](http://repo.magicbane.com/emiliobroome95) levels but also for its potential benefits in injury prevention. For example, in some studies involving athletes, TRT has been shown to improve muscle mass and strength, which could indirectly support recovery from injuries. This means that, in theory, having higher [buy testosterone steroids](https://docentesdeingles.ec/employer/enclomiphene-before-and-after-real-results-timeline-and-what-to-expect/) levels could help speed up the healing of muscle injuries. By increasing the levels of [testosterone store](https://silatdating.com/@catherineshark) in the body, TRT can help restore energy, increase muscle strength, improve mood, and boost sexual function. [testosterone order](https://www.howeasynetwork.com/@alexandermcmul?page=about) Replacement Therapy, or TRT, is a medical treatment designed to increase [buy testosterone online](https://fikfab.net/@selmaquarles95?page=about) levels in individuals who have low levels of this hormone. +By doing so, they can make informed decisions that support their recovery and overall health. Individuals interested in TRT for injury management should consult with their healthcare providers to explore the best options for their specific situation. In conclusion, while TRT offers potential benefits for injury management, it is not a one-size-fits-all solution. It's important for individuals who are on TRT to have regular check-ups with their doctors to monitor their health and make any necessary adjustments to their treatment. The long-term effects of using TRT for injury management are another area of interest. +Although expression of collagen mRNA didn't change significantly, there was a decrease in the ratio of collagen to elastin at the protein level after the cells were treated with 17β-estradiol. However, the benefit of estrogen becomes less apparent with time in culture (Lee H. et al., 2015). In support of this idea, Gray et al. found that young women (aged 15–19) who undergo surgical repair of the ACL are 18% less likely to use oral contraceptives than matched controls (Gray et al., [62.234.194.66](http://62.234.194.66:3000/barbgarvan4702) 2016). To attempt to explain the increased ACL rupture in the pre-ovulatory phases, researchers have measured knee laxity throughout the cycle. One of the best characterized musculoskeletal differences between men and women, is the rupture rate of the anterior cruciate ligament (ACL). +Similarly, Shultz et al. (2005) found that knee laxity increased in direct relation to elevations in plasma estradiol levels. For example, Wojtys et al. (1998) and Wojtys et al. (2002) found higher risk (Wojtys et al., 1998) and occurrence of ACL injury in the ovulatory phase (Wojtys et al., 2002; Figure 2). The resulting studies in general find a higher risk of ACL injury during the pre-ovulatory and ovulatory phases than luteal or follicular phases of the menstrual cycle (Beynnon et al., 2006; Ruedl et al., 2009; Lefevre et al., 2013). Since knee laxity changes with estrogen levels through the menstrual cycle (Shultz et al., 2005), estrogen is believed to decrease sinew stiffness. The result is that a muscle attached to a stiff tendon will experience more eccentric load for a given movement. In other words, instead of the tendon stretching while the muscle contracts isometrically (Griffiths, 1991), a stiff tendon doesn't stretch, and the muscle is forced to lengthen while contracting. +
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