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. 2021 Sep 22;16(9):e0256656. doi: 10.1371/journal.pone.0256656

Table 1. Intersession repeatability of range of motion measurements (ROM), maximum voluntary contraction (MVC), root mean square of the surface electromyographic signal (sEMG RMS), area and perimeter of the center of pressure (CoP), velocity in the antero-posterior (AP) and mediolateral (ML) direction.

CTRL PRE STR PRE ICC SEM%
m(SD) m(SD)
ROM (°) Hip extension 27(4) 26(4) 0.974 2.5
Hip flexion 81(15) 82(16) 0.994 1.5
Ankle Plantarflexion 31(5) 30(5) 0.992 1.5
Ankle Dorsiflexion 37(5) 37(4) 0.982 1.8
MVC (N) knee extensors 595(125) 593(124) 0.997 1.1
Knee flexors 433(81) 432(79) 0.997 1.0
Plantar flexors 758(142) 751(147) 0.976 3.0
Dorsiflexors 480(90) 479(88) 0.998 0.9
EMG RMS (mV) Vastus lateralis 0.726(0.10) 0.728(0.10) 0.992 1.3
Biceps femoris 0.567(0.08) 0.564(0.08) 0.991 1.3
Gastrocnemius medialis 0.538(0.08) 0.534(0.07) 0.991 1.3
Tibialis anterior 0.426(0.06) 0.424(0.06) 0.982 1.8
Static test OE 352(77) 349(75) 0.987 2.5
CE 467(103) 463(106) 0.984 2.8
CoP area (cm 2 ) OE+foam 439(91) 436(89) 0.981 2.8
CE+foam 598(109) 596(111) 0.979 2.7
Static test OE 387(85) 385(77) 0.984 2.7
CE 486(113) 497(111) 0.978 3.4
CoP perimeter (cm) OE+foam 461(96) 473(92) 0.982 2.7
CE+foam 616(117) 605(113) 0.975 3.0
Static test OE 5.8(1.2) 6.1(0.8) 0.728 8.9
CE 6.4(1.3) 6.4(1.3) 0.934 5.1
Speed AP (cm·s -1 ) OE+foam 5.8(0.9) 5.8(0.8) 0.842 5.8
CE+foam 6.4(0.9) 6.2(0.8) 0.793 6.1
Static test OE 3.7(0.5) 3.8(0.5) 0.845 5.3
CE 4.0(0.6) 4.0(0.5) 0.921 3.7
Speed ML (cm·s -1 ) OE+foam 3.7(0.5) 3.7(0.5) 0.900 4.1
CE+foam 4.1(0.6) 4.1(0.6) 0.901 4.4
Dynamic test OE 1156(251) 1164(248) 0.981 3.0
CE 1541(340) 1533(352) 0.978 3.3
CoP area (cm 2 ) OE+foam 1448(301) 1440(294) 0.971 3.5
CE+foam 1974(361) 1960(368) 0.979 2.7
Dynamic test OE 1179(277) 1189(255) 0.976 3.5
CoP perimeter (cm) CE 1664(347) 1652(358) 0.971 3.6
OE+foam 1506(310) 1489(306) 0.980 2.9
CE+foam 2112(375) 2128(379) 0.972 3.0

ICC: intraclass correlation coefficient, SEM%: percentage of the standard error of the measurement. OE: eyes open, CE: eyes closed, OE+foam: eyes open with foam, CE+foam: eyes closed with foam.