Testosterone-boosting supplements are different from testosterone therapy. Testosterone is the major sex hormone in men. Testosterone levels naturally decline as you age. Tons of men manage to sustain stable mood, energy, and strength despite having lower levels compared to when they were younger. Testosterone levels normally decline with age, which begins when a man reaches his 30s. For those considering Hormone Therapy for Men in Asheville, NC, recognizing when hormones, not age, are the root cause is the first step toward feeling like themselves again. If you experience chronic fatigue, stubborn weight gain, low motivation, or constant brain fog, it might be a case of declining testosterone levels. Estrogen levels also rise during a healthy pregnancy. Not training enough, not eating a nutritious diet, lack of sleep, alcohol, and stress all work against muscle growth. Resistance training has the strongest evidence for temporarily increasing testosterone, while HIIT may also trigger increases, particularly in men. Exercise can influence testosterone levels, but the effect depends on the type and intensity of your workouts. For many people, improving cardiovascular fitness can also make it easier to train harder during strength workouts, which may indirectly support muscle-building goals. For example, research has found that men who performed resistance training several times per week experienced increases in testosterone immediately after workouts and improvements over time. Studies show that challenging strength workouts can cause a short-term rise in testosterone after exercise. Testosterone levels usually increase transiently after weights and intense physical activity about 15 minutes to an hour after the workout, Cherullo said. Even within resistance training, the "greater intensity and greater volume of work" are more likely to elevate testosterone, Hackney says. Endurance-based exercises, like cardio, can potentially reduce testosterone. Obesity is linked to low testosterone and other health problems. A small 2016 study found that obese and overweight men saw a boost in their T levels when they increased their physical activity, more so than when they solely restricted calories. Some men who have a testosterone deficiency have symptoms or conditions related to their low testosterone that will improve when they take testosterone replacement. All of this reduces the active (free) form of testosterone in the body. Among women, perhaps the most common cause of a high testosterone level is polycystic ovary syndrome (PCOS). In addition, what may seem like a symptom of testosterone excess (see below) may actually be unrelated to this hormone. Blood levels of testosterone vary dramatically over time and even during the course of a day.