This study looked at declining testosterone in Japanese men. The significant decrease was found in those men between 20 and through 40s. Beyond which statistical decline was not found.
Also of note, lower salivary testosterone was associated with higher BMI
Testosterone was inversely associated with weight and age. This study points to this as the primary driver of low T, even in Diabetics. Total Testosterone was inversely associated with BMI and free (calculated) Testosterone was associated with age.
low Total Testosterone associated with increased BMI, systolic blood pressure, glucose, triglycerides, total cholesterol, LDL apolipoprotien B and A1. Low Testosterone is associated with increased cardiovascular disease. Men at risk for cardiovascular disease must be evaluated for hormones.
Restoration of Testosterone to normal, based on serum hypogonadism, found to significantly aid weight loss, decrease waist circumference and BMI. This study followed men over 5 years, though by year 5 they were following roughly 50% of the original 261.
negative correlation found with total testosterone, free testosterone, SHBG, and BMI. No correlation with sperm quality noted. Of interesting note, the summer season was associated with a decrease sperm concentration.
Nice study. This study tries to get to the source of problem. The authors of this study found that low T in men is more associated with increasing BMI and age versus the presence of diabetes.
Despite evidence that non-smoking, normal BMI, regular exercise, high fruit/vegetable intake and low/moderate alcohol intake, less than 1% of men change lifestyle. Translation: many don't want health even when presented with evidence of its benefits and the means to achieve it.
This study found a decrease in cognitive decline in individuals undergoing these lifestyle changes.
Testosterone therapy, undecanoate in this study, found to improve body weight, decrease waist circumference, BMI, lower Total Cholesterol, lower triglycerides, decrease fasting glucose, decrease HgbA1c, decrease blood pressure and increase HDL in men >59.
Observational study finds BMI increase of 0.375 in both men and women per year. The waist circumference also increased by 0.37% per year in women compared to 0.27% in men. There was a significant reduction in physical activity over the same time period. In women, the reporting of physical inactivity increased to 52% FROM 19% compared to 44% FROM 11% in men. The authors found no association with change in calories. However, an assessment in quality of calories would have likely shown a glaring difference. Clear causation can not be concluded due to the fact that the study was observational.
Abstract only. Study in men seeking reproductive assistance found that increasing BMI had no negative impact on sperm concentration, sperm count, motility and seminal volume.
Study finds low total Testosterone significantly associated with increased BMI in university employees. The definition of low T in this study was 280 ng/dl.
This study follows others: Diabetes associated with low Total Testosterone. The question is whether this is a cause and effect or merely an association?
This study also found age, income, BMI, and diabetic neuropathy as risk for low Testosterone.
Study finds age and BMI associated decline in serum Testosterone levels in Finnish men. This decline was worsened in more recently born age groups evaluated.