A balanced diet rich in protein, vitamins, and minerals is also crucial for supporting muscle health as we age. For men with low testosterone levels, testosterone replacement therapy can help restore muscle mass and improve flexibility. It helps in increasing muscle mass and strength, which can counteract the natural decline in muscle elasticity that occurs with aging. Regular physical activity, particularly resistance training, can help to maintain and even increase muscle mass and strength. It also was found that nerve growth factor increased LH, FSH, and testosterone levels as well as indices of sexual behavior in mice, such as mounting and ejaculation times (Luo et al., 2018). These drugs may also increase testosterone levels, but if used over an extended period, the suppression of estrogen may result in decreased bone mineral density. According to some studies, testosterone replacement therapy for older men does not significantly improve strength or cognitive function, but it does cause venous thromboembolism, heart attack, and stroke. Green et al. (2024) stated that testosterone has impacts on strength, body composition, and aerobic fitness outcomes that are dependent upon dose, route of administration, and formulation. It enhanced testicular hemodynamics, follicle-stimulating hormone, testosterone, and nitric oxide levels while markedly suppressing the lipid profile (Wang et al., 2022). Reducing stress through techniques like mindfulness, yoga, or meditation can lower cortisol levels and elevate testosterone levels (Banihani, 2019). Heavy compound lifting (squats, deadlifts, bench press) triggers acute testosterone release. Men who exercise regularly have a 30% lower risk of ED compared to sedentary men. Men with confirmed low testosterone (below 300 ng/dL on two separate morning blood tests) benefit from testosterone replacement therapy. They are particularly useful post-prostate surgery when nerve damage limits medication response. The Mediterranean diet as a whole has clinical trial support for improving ED scores. Olive oil, avocados, and fatty fish support the hormonal baseline needed for normal erectile function. However, it’s essential to note that exogenous testosterone use (the use of external testosterone sources, such as steroids) is a serious issue in professional sports, with significant health and ethical implications. Moreover, bone health is significantly impacted by testosterone, as it helps maintain bone density, minimizing the risk of osteoporosis and fractures. Its influence extends to metabolic processes, affecting how the body regulates blood sugar and maintains healthy fat distribution. Additionally, testosterone plays a role in libido and erectile function, contributing to the overall sexual health of individuals. This hormone is vital for the development of male characteristics, including facial and body hair, deepening of the voice, and increased muscle and bone mass. Muscle strength typically starts to decline in our 30s, with a more noticeable decrease often occurring after the age of 50. HCG has the same structure and function as the LH, and their receptors are identical (Ilić et al., 2022). Administering testosterone elevates the expression of glucose transporter type 4 and enhances the activity of glycolytic enzymes (hexokinase, phosphofructokinase, and glycogen synthase) (Erenpreiss et al., 2020). It will remain important to do more human research on the framework for using resveratrol as an anti-aging medication. On the other hand, Semba et al. (2014) stated that the dietary resveratrol from Western diets did not significantly affect lifespan in older persons living in the community. It has been demonstrated that resveratrol supplementation causes a penile erection, reduces germ cell apoptosis, increases blood testosterone concentration, and enhances sperm quality and epididymal sperm count (Belhan et al., 2020). Your body then metabolizes your total testosterone into other substances to keep you functioning optimally. Most men focus on total testosterone levels when they’re trying to figure out if they have low testosterone, but free testosterone levels matter, too. Testosterone levels in men can vary widely, though they generally decline in men after the age of 35 says McDevitt. The average male who reaches 70 years old will have testosterone production that’s 30 percent below his peak (5). Low testosterone is influenced by multiple lifestyle factors, many of which are within your control. Unfortunately, certain lifestyle choices can lead to a decline in testosterone, impacting overall well-being. Testosterone plays a critical role in muscle growth, energy levels, mood, and sexual health. A balanced diet rich in essential nutrients can help maintain muscle mass, support muscle repair, and promote flexibility. To mitigate the effects of physical inactivity on muscle stiffness and flexibility, it is essential to incorporate regular movement and exercise into one's daily routine. Understanding the roles of testosterone and estrogen in muscle health can help individuals take proactive steps to maintain their muscle flexibility and overall well-being as they age.