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In this study, 10 athletes with documented reductions in performance performed this test and then followed to monitor for performance recovery. EHMC athletes continue to perform at a high level despite profoundly suppressed testosterone.1,20 In OTS, performance falls. Peripherally, even when the testes are experimentally stimulated directly with exogenous hCG — bypassing the brain entirely — EHMC athletes produce 15–40% less testosterone than healthy controls.33 When these confounders are accounted for, the residual case of true training load-induced OTS hasn’t been characterized in an adequately fueled, psychiatrically healthy, non-PED-using athlete. Until we have more research that prioritizes performance tracking alongside training load, these incidence rates remain speculative. Without performance data, it’s also impossible to distinguish between true OTS and cases where the training stimulus was simply insufficient to cause a positive adaptation .
Testosterone supplementation resulted in a statistically significant increase in SDNN, SDANN, TP, LF, ULF, and very‑low‑frequency domain. Holter monitoring was performed in all patients at baseline and at the end of the therapy.
5α-DHT binds to the same androgen receptor even more strongly than testosterone, so that its androgenic potency is about 5 times that of T. Free testosterone (T) is transported into the cytoplasm of target tissue cells, where it can bind to the androgen receptor, or can be reduced to 5α-dihydrotestosterone (5α-DHT) by the cytoplasmic enzyme 5α-reductase. Androgens such as testosterone have also been found to bind to and activate membrane androgen receptors.
Clearly, though, it's much more important to see if testosterone therapy can change the risk of actual clinical cardiovascular events. One month of treatment produced a 74-second gain in exercise tolerance without changing HDL or LDL cholesterol levels. Still, if testosterone therapy could help men with heart disease, it would bolster the argument that testosterone may be safe for the heart. Peripheral artery disease (PAD) is an important form of atherosclerosis in its own right, and it also signals an increased risk for heart disease. Obesity increases the risk of both diabetes and heart disease. Androgen-deprivation therapy produces insulin resistance and increases the risk of diabetes.
The problem is the same (a training load-recovery mismatch) but getting the interpretation wrong towards under-loading is at least as costly as getting it wrong toward over-loading. An athlete not progressing because they have been systematically underloading needs more training. Align testing with training, and monitor session RPE for signs of genuine load-recovery imbalance. For example, an individual on a hypertrophy program tested on one-rep max strength is likely to see a poor result that has nothing to do with over- or under-training. If the training program does not match how the athlete is measuring progress, they may see "no result" when there are other fitness adaptations occurring. For example, an individual who is unable to add weight to an exercise week over week may interpret this result as being overtrained when it’s just as likely they are undertrained. Monitoring progress in response to exercise can be challenging, especially if one is using the wrong tools or is interpreting their results incorrectly.
In contrast, men on smaller, more frequent doses had more stable testosterone levels and fewer heart-related symptoms. These spikes were usually short-term and happened when testosterone levels peaked in the bloodstream. Some report a small increase in heart rate, while others find no significant difference compared to those not taking testosterone. To understand this better, it helps to look at how testosterone affects the body and how it may lead to changes in heart rate.
Some people on TRT report feelings of their heart "racing" or beating harder. A normal resting heart rate for adults is usually between 60 to 100 beats per minute. One possible side effect that some people may notice is a faster heartbeat. Monitoring helps identify early signs of unwanted effects and allows for safe adjustments to the therapy plan. Overall, current research does not show strong or consistent evidence that TRT causes dangerous heart rate changes in most patients. The authors concluded that more long-term studies are needed to fully understand how TRT affects the heart over time.
Overtraining syndrome is a poorly defined and rarely demonstrated condition that can only be diagnosed after ruling out more common explanations. Most people who think they are "overtrained" are not. Here is what that means, and what to do when your training is actually not working. Your personal "normal" may vary based on your fitness level, genetics, medications, and health conditions. For most healthy women, this typically ranges between 60 and 100 bpm.

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