The primary outcomes are an evaluation of methodology for the assessment of overtraining, a comparison of hormonal tests performed and analysis of results of studies involving correlation between hormones and OTS/NFOR/FOR. But the truth is, excessive training without proper recovery can wreak havoc on your hormonal health — especially your testosterone levels. Some promising studies in older men have shown a direct correlation between exercise and basal plasma testosterone concentrations; however, conclusions are still preliminary until a greater depth of literature is available .
In addition, from work in an animal model,12 it appears that the pro-dynorphin (Pdyn) gene is upregulated with a period of intensive exercise. Cortisol is known to interfere with testosterone’s androgen receptor binding.11 It is also possible that increased testicular vascular resistance leads to a lowering of blood flow and therefore a blunting of testosterone in blood. During periods of chronic stress exposure, a suggested cortisol resistance can occur, leading to a lowered cortisol response to stress due to an interplay between the nervous, endocrine and immune systems.10 It is likely that a desensitisation of the adrenal glands or a dysfunctional hypothalamus or pituitary gland are the possible cause of the reduction in cortisol.
A 2024 systematic review found that nocebo effects in sport and exercise were roughly twice the magnitude of placebo effects on performance across 20 studies.3 Language about fatigue states produces real physiological effects. The flawed stress-recovery-adaptation model is not the only source of confusion — the word overtraining itself is doing at least four different jobs simultaneously. Overtraining Syndrome (OTS) is defined as a persistent decrease in performance resulting from exercise that lasts for months to potentially years.
A study by West et al. showed that exposure of muscles to basal or high serum testosterone concentrations with exercise can result in similar muscle adaptations and hypertrophy. Interestingly, some studies have even shown that chronic endurance exercise can correlate inversely with basal serum testosterone concentrations. Many studies have addressed the effect of habitual or intervention exercise on basal (resting) serum testosterone concentrations, with no clear effect reported so far. Involvement of a small muscle mass, even when vigorous resistance exercise is performed, does not elevate serum testosterone concentrations above resting levels .
While some supplements are marketed as testosterone boosters, most have limited scientific evidence to support their claims. Are there any dietary supplements that can boost testosterone? However, for sustained increases, consistent exercise over several weeks or months is typically required. HIIT workouts can be incorporated 1-2 times per week, ensuring adequate rest and recovery between sessions. High-intensity interval training (HIIT) can also provide a significant boost. Consulting with a healthcare professional or certified personal trainer is recommended to develop a personalized exercise plan tailored to your specific needs and goals.
Although it is important to remember that low testosterone-hypogonadism can exist in athletes-exercisers due to other scenarios such as TBI events or AAS use, and should always be ruled-out before assuming other causalities. It is proposed herein, that the development of exercise relative hypogonadism from training can be generalized into one of two categories; an acute, transient phenomenon (overtraining, Triad/RED-S … etcetera) or a more chronic phenomenon reflective of a training-induced adaptation (EHMC). The evidence clearly indicates that exercise training can result in the development of low testosterone in men, and at times the level of reductions reaches the clinical definition of hypogonadism. Finally, and importantly to the present discussion, in most clinical diagnosis settings, much of the assessment and detection of reproductive dysfunction relies on evaluating hormonal status in a resting, basal condition and not in response to an exercise session (53). In general, these acute-chronic exercise endocrine principles for hormonal response hold true for the reproductive and non-reproductive hormones (52).
But those that lifted heavy with low volume found that while performance dropped, no changes to hormones occurred at all. Lifters that completed a higher-volume workout had reductions in testosterone that were similar to those taking part in endurance training… reduced T, elevated cortisol and low mood. But there are hardly any clinical trial research projects that have looked at how excessive training affects muscle mass or strength in bodybuilders.
Your body needs a break from the chronic stress signal. This means fewer sessions per week, lower intensity, and prioritizing active recovery (walking, yoga, light swimming). Implement a Structured Deload or Training BreakReduce training volume by 50–70% for at least 2–4 weeks. The longer you ignore the symptoms, the more complex and prolonged the recovery process becomes. At this stage, medical evaluation and potential hormone replacement therapy (HRT) may be necessary to restore baseline function. This includes significant training volume reduction (50–70% decrease), nutritional periodization, stress management, and, in some cases, targeted supplementation (Vitamin D, Zinc, Magnesium).
I’ve seen many fitness ‘experts’ claiming that there’s no such thing as overtraining, or that every guy could lift for 7 days a week, and if they can’t they’re just lazy or unmotivated. Genetics play a significant role in both muscle building potential and testosterone production. The degree of muscle growth is typically less than in men due to the hormonal difference. TRT can be effective for building muscle in men with clinically diagnosed low testosterone. However, they won’t cause dramatic increases in testosterone beyond your body’s natural capacity. While resistance training stimulates testosterone release, the increase is often temporary and within a normal physiological range. While testosterone is essential for muscle growth, the relationship is complex and influenced by a multitude of factors.

Gender: Female

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