Figure 2 Results of the surface electromyography (sEMG) amplitude analysis, presented as root mean square (RMS) values and estimated differences in mean RMS amplitudes between the 3 groups (in microvolts [μV]). The top row shows the individual recorded sEMG RMS values (points). The height of the box shows the interquartile range (ie, middle 50% of the data) and the bold line within the box is the median. The white points with blue vertical lines show the estimated mean sEMG RMS values and 95% highest density intervals (HDI; ie, uncertainty of the estimated mean) derived from the Bayesian multivariate robust linear regression. The bottom row shows the estimated differences (points) in mean sEMG RMS values with corresponding 80% and 95% HDI. The R2 values in panel subtitles are for the whole model, including age and body mass index (BMI) effects. This figure was created using R 4.4.3 and ggplot2 library.