Complicating matters, testosterone levels fluctuate, peaking around 8 a.m. and diminishing throughout the day. Levels tend to be lowest around 8 in the evening, then climb during the night. The peaks and valleys are larger for men 40 and younger compared to men in their 70s.
Even before a man wakes up, his testosterone levels are at their peak -between 25-50 per cent more than at any other time of the day. That's because the pituitary gland -which governs the production of the male sex hormone -has been switched on in the night and levels have been steadily rising until dawn.
Levels of testosterone are highest in the morning, which likely encourages those AM erections. Testosterone levels start to slowly decline around age 40 and could contribute to less morning erections.
3. When you exercise: Your testosterone levels vary throughout the day. Levels are typically highest in the morning and lowest in the afternoon.
The increase in testosterone is sleep, rather than circadian rhythm, dependent and requires at least 3 h of sleep with a normal architecture.
Your testosterone levels increase as you sleep and decrease the longer you're awake. The highest levels of testosterone production occur during REM sleep, the period late in the sleep cycle that helps replenish the body and mind.
Eve Van Cauter, PhD, professor in medicine and director of the study, found that men who slept less than five hours a night for one week in a laboratory had significantly lower levels of testosterone than when they had a full night's sleep.
Morning wood and hormones
A higher testosterone level contributes to waking erections, which means for many men that their regular morning wood and/or their nighttime erection becomes less regular as they age. Additionally, guys' testosterone levels are highest in the morning, right after you wake up.
It's expected for peak testosterone levels to arrive in a man's teenage years—around 18 or 19—before it starts to decline. But the human body can start producing testosterone even during infancy as it's responsible for the development of the male reproductive system.
Testosterone is responsible for increased muscle mass. Leaner body mass helps control weight and increases energy. For men with low testosterone, studies show that treatment can decrease fat mass and increase muscle size and strength. Some men reported a change in lean body mass but no increase in strength.
Diagnosing high testosterone
A doctor may check for signs and symptoms of high testosterone, including excessive body hair, acne, and increased muscle mass. They will also ask about a person's libido and mood. If relevant, the doctor may enquire about the person's menstrual cycle.
Studies show that men's testosterone levels have been declining for decades. The most prominent, a 2007 study in the Journal of Clinical Endocrinology and Metabolism, revealed a “substantial” drop in U.S. men's testosterone levels since the 1980s, with average levels declining by about 1% per year.
After age 30, most men begin to experience a gradual decline in testosterone. A decrease in sex drive sometimes accompanies the drop in testosterone, leading many men to mistakenly believe that their loss of interest in sex is simply due to getting older.
Men with high testosterone can experience a variety of troubling symptoms and possible health consequences. Excess testosterone can lead to more aggressive and irritable behavior, more acne and oily skin, even worse sleep apnea (if you already have it), and an increase in muscle mass.
When Do Men Reach Their Physical Peak? A study done by Robert Kail and John Cavanaugh and featured in the book, Human Development: A Life-Span View, stated that men reach their physical peak between their late 20s and early 30s.
Men older than age 65 should have a testosterone level of about 300–450 ng/dL.
Erections typically last a few minutes or, in some cases, up to about a half hour. If you have an erection that lasts more than a four hours (priapism) or one that's unrelated to sex, talk to your doctor right away or seek emergency care.
Yes, it's completely normal to have an erection when waking up in the morning. In fact, guys often have about three to five erections each night while they sleep — they're just not aware of them.
Among men, consumption of caffeinated coffee increased total testosterone and decreased total and free estradiol. Among women, decaffeinated coffee decreased total and free testosterone and caffeinated coffee decreased total testosterone.
Testosterone levels rise during sleep and decrease during waking hours. Research has shown that the highest levels of testosterone happen during REM sleep, the deep restorative sleep that occurs mostly late in the nightly sleep cycle.
Aside from making healthy lifestyle choices and addressing medication side effects or untreated medical conditions, there's little you can do to naturally boost your testosterone level. Testosterone levels vary greatly among men. In general, however, older men tend to have lower testosterone levels than do younger men.
“Exercise will boost testosterone, though certain types of exercise increase testosterone more than others,” says Richard Jadick, D.O., a Piedmont urologist. Exercise can raise testosterone because it promotes: Muscle building. The more muscle you have, the higher your testosterone levels.