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Pearson correlation coefficients (r) of HR mean values between Biopac (GS), Apple Watch (AW) and Polar Vantage (PV) systems for the four activities (n = 18).
| Activity | Lying | Sitting | Standing | Walking | ||||
|---|---|---|---|---|---|---|---|---|
| Wearable | Apple (AW) | Polar (PW) | Apple (AW) | Polar (PW) | Apple (AW) | Polar (PW) | Apple (AW) | Polar (PW) |
| Biopac (GS) | 1.000** | .998** | .999** | .950** | .998** | .925** | .998** | .652* |
| Apple (AW) | – | .998** | – | .960** | – | .929** | – | .677* |
Significant differences: *p < .01; **p < .001**
