|
Force level
|
10%
| |
20%
| |
40%
| |
60%
| |
80%
| |
|---|
|
Group
|
Young
|
Old
|
Young
|
Old
|
Young
|
Old
|
Young
|
Old
|
Young
|
Old
|
|---|
|
Measure
|
Mean (SD)
|
Mean (SD)
|
Mean (SD)
|
Mean (SD)
|
Mean (SD)
|
Mean (SD)
|
Mean (SD)
|
Mean (SD)
|
Mean (SD)
|
Mean (SD)
|
|---|
|
Mean
|
10.06 (0.34)
|
10.45 (1.64)
|
19.78 (0.44)
|
19.92 (1.14)
|
39.26 (0.80)
|
39.33 (1.11)
|
58.54 (1.62)
|
57.94 (1.81)
|
78.05 (2.17)
|
76.50 (3.45)
|
|
SD
|
0.41 (0.22)
|
0.79 (0.40)
|
0.47 (0.11)
|
0.71 (0.24)
|
0.94 (0.25)
|
1.22 (0.58)
|
1.99 (0.77)
|
2.52 (2.49)
|
2.82 (0.98)
|
3.56 (2.78)
|
|
CV
|
0.04 (0.02)
|
0.08 (0.04)
|
0.02 (0.01)
|
0.04 (0.01)
|
0.02 (0.01)
|
0.03 (0.01)
|
0.03 (0.01)
|
0.04 (0.05)
|
0.04 (0.01)
|
0.05 (0.04)
|
|
Index of efficiency
|
|
S-t-N
|
28.14 (7.35)
|
16.53 (7.36)
|
44.53 (11.09)
|
30.67 (13.16)
|
45.13 (11.42)
|
35.71 (14.49)
|
34.08 (10.19)
|
31.86 (12.17)
|
31.09 (10.35)
|
28.34 (10.67)
|
|
Frequency analysis
|
|
Slope
|
−1.02 (0.33)
|
−0.88 (0.49)
|
−1.31 (0.35)
|
−1.05 (0.31)
|
−1.74 (0.32)
|
−1.55 (0.28)
|
−1.92 (0.26)
|
−1.65 (0.36)
|
−1.89 (0.32)
|
−1.85 (0.38)
|
|
Peak power (0–4 Hz)
|
0.05 (0.03)
|
0.15 (0.12)
|
0.10 (0.03)
|
0.21 (0.20)
|
0.52 (0.41)
|
0.54 (0.27)
|
3.00 (3.36)
|
9.23 (25.18)
|
5.14 (4.83)
|
9.35 (11.99)
|
|
Prop power (0–4 Hz)
|
0.134 (0.082)
|
0.099 (0.049)
|
0.130 (0.033)
|
0.094 (0.046)
|
0.115 (0.025)
|
0.109 (0.018)
|
0.136 (0.040)
|
0.129 (0.058)
|
0.130 (0.041)
|
0.133 (0.009)
|
|
Peak power (7–15 Hz)
|
0.02 (0.02)
|
0.08 (0.10)
|
0.02 (0.02)
|
0.07 (0.08)
|
0.03 (0.02)
|
0.07 (0.08)
|
0.07 (0.05)
|
0.10 (0.08)
|
0.19 (0.23)
|
0.18 (0.13)
|
|
Prop power (7–15 Hz)
|
0.041 (0.038)
|
0.039 (0.019)
|
0.018 (0.011)
|
0.033 (0.022)
|
0.007 (0.005)
|
0.014 (0.010)
|
0.006 (0.006)
|
0.009 (0.014)
|
0.007 (0.009)
|
0.007 (0.009)
|
|
Multiscale complexity analysis (SampEn)
|
|
Area
|
70.53 (6.75)
|
63.32 (10.43)
|
79.18 (7.59)
|
74.96 (13.59)
|
88.98 (9.94)
|
83.42 (10.95)
|
88.29 (9.94)
|
90.24 (11.65)
|
84.10 (16.40)
|
85.87 (14.39)
|
|
Area 30-60
|
40.83 (6.24)
|
35.98 (7.01)
|
46.13 (4.89)
|
42.41 (9.89)
|
54.08 (7.71)
|
48.87 (6.54)
|
53.92 (7.08)
|
54.68 (8.09)
|
51.86 (10.95)
|
52.44 (8.22)
|
|
Scale 4
|
1.69 (0.21)
|
1.64 (0.29)
|
1.45 (0.20)
|
1.63 (0.26)
|
1.16 (0.21)
|
1.34 (0.21)
|
1.02 (0.22)
|
1.12 (0.29)
|
0.97 (0.34)
|
1.01 (0.35)
|
|
Scale 10
|
1.38 (0.11)
|
1.29 (0.23)
|
1.38 (0.17)
|
1.42 (0.17)
|
1.40 (0.19)
|
1.42 (0.18)
|
1.37 (0.18)
|
1.38 (0.26)
|
1.28 (0.31)
|
1.30 (0.34)
|
|
Scale 30
|
1.29 (0.17)
|
1.16 (0.24)
|
1.53 (0.26)
|
1.34 (0.19)
|
1.65 (0.33)
|
1.55 (0.22)
|
1.57 (0.28)
|
1.65 (0.21)
|
1.51 (0.30)
|
1.62 (0.33)
|
- Means and standard deviations of the general properties of force production, signal-to-noise ratio (S-t-N), as well as results of the frequency and MSE analyses.
