Updated 4 months, 2 weeks ago

Aerobic exercise boosts testosterone for overweight men

Twelve weeks of aerobic exercise significantly boosted testosterone levels in overweight and obese men, with the greatest increases seen among vigorous exercisers, according to research presented on November 7, 2016 at the Integrative biology of exercise.

Testosterone is a predominantly male sex hormone, mainly produced by the testicles.

In men, testosterone is responsible for sustaining sperm production, sex drive, facial and body hair, muscle size and strength, fat distribution, red blood cell production, and bone density.

According to the Mayo Clinic, men's testosterone levels typically start to decrease from the age of 30 or 40, falling around 1 percent each year.

The research team compared 16 normal weight men to 28 overweight/obese men. None of the men were regular exercisers. At baseline, the overweight/obese men had significantly lower total, free and bioavailable testosterone level than normal weight men. All of the study volunteers completed a 12-week aerobic exercise plan that entailed 40-60 minutes of walking or jogging on one to three days per week. Testosterone levels were also recorded at the end of the study.

The researchers point out that the testosterone levels of the overweight or obese men were still lower than those of the normal-weight men following the exercise intervention, but their findings remain promising.

Overweight or obese men did show some weight loss with the exercise program, which the researchers speculate may have contributed to the rise in testosterone levels.

"However, the degree of weight loss is small, and we found that the increase in vigorous physical activity was independently associated with the increase in serum testosterone levels," notes Kumagai, lead researcher on the study. lead researcher on the study

Finally, it seems the increase in physical activity, especially vigorous physical activity, is the main factor for increasing

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