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question from a user

If still answering, curious about hear rate when on TRT. Before starting, I had a consistent RHR of 55-59. After being on trt for about 7 months, my RHR now about 67 and is typically higher all the time in general, esp when sleep. What could cause this?

AlphaMD's Answer

HR increase on TRT - while this is not a common complaint, it is known to occur. While the phenomenon has not been evaluated extensively, a common theory is that increased viscosity (thickness) or volume (fluid retention) of the blood may be a cause. If you haven’t already, you should have your doctor check your hematocrit to see if this is true in your case. Another theory is that on TRT, your testicular function shuts down, and your body recognizes that. So it ramps up your adrenal gland production of testosterone (yes, your adrenal glands also produce testosterone, not just your testicles). Because the adrenal glands also produce adrenaline, the increased adrenal activity releases more adrenaline, raising your heart rate.

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