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

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

Strength Surface	Logistic Equation Parameter Values								R²
Strength Surface	A	B	C	D	E	F	G	H	R²
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
Adjusted^a Female PF	−4.87	12.45	6.99	11.61	19.09	−65.52	78.43	27.85	0.98
Adjusted^a Male PF	−41.94	46.95	4.14	18.66	74.29	−584.05	185.18	291.76	0.95

^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

ISSN: 1757-1146