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. 2018 Jun 17;2(3):E67–E70. doi: 10.1055/a-0631-0920

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This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

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Fig. 2 — Heart rate during yoga exercise by device. Data are means±standard deviation. The dashed line with circles represents the Polar ^® H7 (criterion) with the thin dotted lines representing the associated SD. The solid line with squares represents the Polar ^® OH1, with the thin solid lines representing the associated SD.