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Table 2 3D strength surface model parameters for unadjusted and adjusted surfaces, with resulting R2 values, for women (unshaded) and men (shaded)

From: 3D strength surfaces for ankle plantar- and dorsi-flexion in healthy adults: an isometric and isokinetic dynamometry study

Strength Surface Logistic Equation Parameter Values R2
A B C D E F G H
Female DF −65.35 79.29 23.02 43.44 1056.06 −295.86 66.86 −762.36 0.95
Male DF −54.81 78.02 17.85 29.12 372.89 −223.82 55.01 −16.93 0.97
Female PF −9.72 17.85 4.14 16.95 59.16 −329.37 98.66 264.20 0.92
Male PF −38.28 68.43 0.73 −23.68 −1042.06 −262.33 52.77 2628.56 0.89
Adjusteda Female PF −4.87 12.45 6.99 11.61 19.09 −65.52 78.43 27.85 0.98
Adjusteda Male PF −41.94 46.95 4.14 18.66 74.29 −584.05 185.18 291.76 0.95
  1. aPlantarflexion (PF) surface models adjusted by removing two isometric peak torque values (0°, −10°) that may have been influenced by knee and hip extension moments. Note the increase in R2 values for the adjusted surfaces relative to the non-adjusted surfaces