April 22, 2026, 2:53 am | Read time: 6 minutes
When people talk about cycles, most think first of the female menstrual cycle. However, men also experience biological fluctuations, albeit in a different rhythm and with different patterns. Hormones like testosterone are not constant but undergo daily, weekly, and long-term changes that can affect mood, energy, performance, and even behavior. FITBOOK consulted an expert to explain the details.
Interestingly, many of these fluctuations occur so regularly that one could indeed speak of a kind of “male cycle.” It functions like a biological clock that can be understood and used to one’s advantage.
How Does the Male Cycle Behave?
24-Hour Rhythm
“Strictly speaking, men do not have a cyclical hormone pattern like women, which is divided into clearly defined phases over about 28 days. Nevertheless, the male hormone system is by no means constant but is subject to various biological rhythms, especially with testosterone,” explains urologist Dr. Christoph Pies in an interview with FITBOOK. “The most important rhythm is the daily (circadian) cycle. Testosterone reaches its peak in the early morning hours and decreases continuously throughout the day, with the lowest levels in the evening and at night. This 24-hour rhythm significantly influences energy, performance, motivation, mood, and even social dynamics more than other fluctuations.”
Short-Term Fluctuations
There are also slight short-term variations influenced by factors such as sleep, stress, and physical exertion. Seasonal differences can also be observed, meaning testosterone levels may be slightly higher in fall and winter than in spring and summer. However, this apparent seasonal effect is not scientifically proven.
Changes Over the Years
On an even larger time scale, testosterone levels change throughout life. From about the third to the fourth decade of life, they slowly and continuously decrease in many men, with lifestyle, health, and genetic factors significantly influencing this course.
What Influences the Male Cycle?
Sleep
Healthy, sufficient sleep is one of the most important factors affecting testosterone levels. Large portions of the hormone are produced during the night, especially in deep sleep phases. Lack of sleep or poor sleep quality can significantly disrupt this process and noticeably lower levels.
Stress and Cortisol
Chronic stress directly affects the hormonal balance. The stress hormone cortisol is inversely related to testosterone and can inhibit its production, which is why prolonged pressure in everyday life can lead to lower testosterone levels over time.
Exercise
Regular physical activity, especially strength training, supports stable testosterone levels. Intense exertion within a reasonable framework can even promote a short-term increase, although excessive training without sufficient recovery can have the opposite effect.
Nutrition
A balanced diet provides the foundation for healthy hormone production. Particularly important are sufficient calories, healthy fats, and micronutrients like zinc, magnesium, and vitamin D. A one-sided or severely calorie-restricted diet can, however, throw the hormonal balance off.
Body Fat Percentage and Metabolism
An increased fat percentage can promote the conversion of testosterone into estrogens, thereby lowering the overall level. At the same time, severe underweight can negatively affect hormone production.
Daylight and Internal Clock
The so-called internal clock (circadian rhythm) is strongly controlled by light. Daylight helps stabilize the hormonal balance and supports healthy testosterone production. Regular sleep-wake times, in particular, have a positive effect on the rhythm.
Stimulants
Alcohol, nicotine, and certain medications can negatively affect testosterone levels in the long term. Especially with regular or high consumption, hormonal processes are disrupted.
How Does the Male Daily Cycle Progress?
Morning: Energy, Focus, Drive
Between 6 and 8 a.m., testosterone reaches its peak. Many men experience increased alertness, stronger drive, better concentration, and heightened motivation for physical activity. This is no coincidence, as the body is evolutionarily set to be particularly ready for performance in the morning. Muscle strength and reaction capability can also be slightly increased during this phase. The morning is thus particularly suitable for demanding tasks, training, or decisions that require clarity.
Late Morning to Noon: Stable Performance Phase
Throughout the late morning, hormone levels remain relatively stable but begin to slowly decline. This phase can be described as a work mode with good cognitive performance, stable emotional state, and high productivity. The morning peak can often be well translated into focused work, as there is still sufficient energy physically, even if the maximum hormonal boost is already slightly waning.
Afternoon: Energy Decreases, Irritability May Increase
In the afternoon, many men experience a noticeable drop in testosterone. At the same time, other factors such as blood sugar fluctuations, work stress, or mental fatigue may add up. This phase often shows decreasing motivation, shorter concentration spans, increased irritability under stress, and a noticeable energy dip between 2 and 5 p.m. This is not an individual failure but part of a biological rhythm. The body slowly shifts from performance to regeneration mode.
Evening: Regeneration and Rest
In the evening, testosterone levels reach their lowest point. The body prepares for recovery with decreasing physical activity, increasing tiredness, and a stronger need for rest and social relief. Interestingly, this phase plays an important role in nighttime regeneration. During sleep, testosterone is rebuilt.
Night: Hormonal Reset Phase
During sleep, testosterone rises again. Therefore, good sleep is one of the strongest factors influencing the hormonal balance, and chronic sleep deprivation can shift and permanently lower the entire rhythm.
Is There “Male PMS”?
The term “male PMS” appears repeatedly but is not clearly defined medically. While some men report phases of irritability, mood swings, lack of drive, or increased stress sensitivity, these cannot usually be attributed to a fixed, recurring hormone cycle like in women. Instead, other factors are usually at the forefront, such as lack of sleep, chronic stress, low testosterone levels (hypogonadism), or general lifestyle factors. Professionally, it is more about hormonal imbalances than a true “male PMS.”
Is Sexual Drive Influenced by the Rhythm?
Testosterone plays a central role in libido and sexual motivation. Since levels are highest in the morning, many men also report increased sexual desire at this time of day.
How Aging Affects Male Genitalia
7 Signals for Men Over 40 to Check Their Testosterone Levels
Can You “Smell” Testosterone and Are Men Then More Attractive?
The idea that hormonal changes are perceptible through smells comes from research on so-called pheromones. In humans, however, the data is not clear. There are indications that body odor is slightly influenced by hormones and that emotional and biological states can be subtly perceived. But a clearly measurable “testosterone smell” that reliably increases attractiveness is not scientifically proven.
Conclusion
Men do not have a classic cycle like women, but they do have a biological rhythm strongly influenced by testosterone levels. The daily cycle, in particular, shows clear patterns: high in the morning, steadily declining during the day, low in the evening, and regenerating at night. Understanding this dynamic allows for better planning of energy, training, work, and recovery without working against one’s own body. Instead of being surprised by performance lows, the natural rhythm can be consciously integrated into daily life.