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Table 3 Values of assessed parameters

From: Adaptive Force of hamstring muscles is reduced in patients with knee osteoarthritis compared to asymptomatic controls

Parameter

ART1

ART2

CON1

CON2

MVICpre (Nm/kg)

0.96 ± 0.33

0.96 ± 0.34

1.38 ± 0.21

1.30 ± 0.30

MVICpost (Nm/kg)

0.90 ± 0.26

0.91 ± 0.31

1.26 ± 0.22

1.25 ± 0.29

AFmax (Nm/kg)

0.82 ± 0.31

0.81 ± 0.35

1.21 ± 0.20

1.23 ± 0.28

AFisomax (Nm/kg)

0.60 ± 0.28

0.59 ± 0.34

0.79 ± 0.24

0.98 ± 0.31

AFisomax/AFmax

0.73 ± 0.19

0.74 ± 0.22

0.65 ± 0.15

0.78 ± 0.13

AFisomax/MVICpre

0.63 ± 0.21

0.61 ± 0.22

0.57 ± 0.15

0.75 ± 0.16

AFmax/MVICpre

0.86 ± 0.16

0.84 ± 0.17

0.88 ± 0.09

0.95 ± 0.08

%Diff AFmax to MVIC (%)

 − 14.35 ± 16.38

 − 16.42 ± 17.30

 − 12.07 ± 8.80

 − 5.06 ± 7.61

%Diff AFisomax to MVIC (%)

 − 36.82 ± 21.09

 − 38.58 ± 22.07

 − 42.68 ± 14.66

 − 25.10 ± 15.94

normalized AFmax to ROM (Nm/kg/°)

0.12 ± 0.06

0.11 ± 0.05

0.16 ± 0.03

0.19 ± 0.05

angle at start (°)

91.9 ± 0.3

92.0 ± 0.8

92.0 ± 0.3

91.9 ± 0.4

angle at AFmax (°)

84.5 ± 1.3

84.3 ± 1.4

83.9 ± 1.1

84.7 ± 1.6

duration isometric phase (s)

4.5 ± 1.7

4.7 ± 2.14

3.8 ± 1.55

5.2 ± 1.5

duration eccentric phase (s)

4.2 ± 2.3

4.1 ± 2.3

5.4 ± 1.5

4.2 ± 2.5

  1. Arithmetic means ± standard deviations of normalized torques (Nm/kg), their ratios, the percentage differences (%Diff) of AFmax and AFisomax to MVIC, the torque development per degree of yielding (ratio AFmax to ROM; Nm/kg/°), the angles of the ACClever at start and at AFmax as well as the durations of the isometric and eccentric phases of patients with knee OA for the less affected/asymptomatic side (ART1, 1st-measured; n = 18) and for the more affected side (ART2, 2nd-measured; n = 20) as well as of controls for the first (CON1, n = 18) and second measured side (CON2, n = 15)
  2. AFisomax = max. isometric Adaptive Force (AFisomax); AFmax = max. AF; MVICpre = max. voluntary contraction before AF trials; MVICpost = MVIC after AF trials. ROM = range of motion refers to the difference of angles (ACClever) between start and AFmax