Fig. 2

Inter-instrument reliability analysis between GripAble and Jamar+ dynamometers: (a) A regression line and scatterplot showing high linearity of the MGS measurements between GripAble and Jamar+ across participants. (b) Bland–Altman plot showing the differences in Jamar+ and GripAble measurements \({D}_{GJ}\) against their means \({\mu }_{GJ}\). The solid line is the statistically significant regression line between these two parameters, suggesting a proportional relationship where the difference increased as the mean increased. The upper and lower dashed lines are limits of agreement computed using the method outlined in Bland (1999) [23]