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. 2021 Jun 7;12:617889. doi: 10.3389/fpsyg.2021.617889

FIGURE A1.

FIGURE A1

Confidence intervals of the Pearson correlation coefficient (r) for meta-analyses of Ln-transformed grip force’s measures (mean, maximum, and standard deviation) with Ln-transformed heart rate measures (HRV LF, HRV HF, HRV LF/HF ratio, and heart rate) for each grip force’s time window (2, 5, 10, 20, and 30 s).