My husband is a professional sportsman, and he taught me. For better results, I bought a Canyon CNS-SB75 smart bracelet. He has a similar one, but the plush version is already. This is just a godsend, in addition to the usual functions, it measures the ECG, monitors the state of the body. Am I ready to train, does my heart rate allow it. The bracelet has high-precision sensors that allow you to make measurements quite accurate. At the same time, all batteries with active use last for 5 days.
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