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Average and standard deviation of HR parameters for the laboratory group.
| Transducer Frequency | During Relaxation | After Physical Activity |
|---|---|---|
| Average Value + Standard Deviation ΔHR (min−1) | Average Value + Standard Deviation ΔHR (min−1) | |
| f1 = 40 kHz | 10.42 ± 28.49 | 15.48 ± 38.04 |
| f2 = 39 kHz | 14.14 ± 34.39 | 10.99 ± 33.33 |
| Opt. sig. with ECG | 0.23 ± 0.61 | 0.29 ± 0.67 |
| Opt. sig. without ECG | 0.31 ± 0.88 | 0.42 ± 0.75 |
