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. 2024 Jun 27;12:520–532. doi: 10.1109/JTEHM.2024.3419805

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FIGURE 4. — Results of frequency-domain HRV parameters for individuals undergoing slow deep breathing exercises at different stages (I:E = 1:2; breathing rate = 6 bpm). *, **, *** represent , 0.01, and 0.001, respectively.

Inline graphic — Results of frequency-domain HRV parameters for individuals undergoing slow deep breathing exercises at different stages (I:E = 1:2; breathing rate = 6 bpm). *, **, *** represent , 0.01, and 0.001, respectively.