Table 2 Mean and standard deviation, 95 % CI of EMG activity of the VMO and VL muscles

DS^*

56.66 ± 5.53

68.14 ± 6.38

103.31 ± 44.54

8.02 ± 3.45

55.88 ± 5.17

65.57 ± 4.96^b

85.02 ± 41.19^b

6.72 ± 3.20^b

(54.60–58.72)

(65.76–70.52)

(86.68–119.94)

(6.73–9.30)

(53.95–58.72)

(62.72–66.42)

(69.64–100.40)

(5.53–7.92)

DS-HA^*

57.21 ± 4.93

67.79 ± 5.83

113.00 ± 41.08

8.82 ± 3.15

56.51 ± 5.97

65.47 ± 6.08

105.81 ± 44.23^a

8.30 ± 3.55^a

(55.37–59.05)

(65.61–69.96)

(97.66–128.34)

(7.65–9.99)

(54.27–58.74)

(63.20–67.74)

(89.30–122.33)

(6.98–9.63)

DS^**

56.45 ± 5.99

68.30 ± 7.64

99.25 ± 31.14

7.83 ± 2.48

56.68 ± 6.45

66.53 ± 7.56

104.10 ± 48.75

8.27 ± 3.81

(54.90–58.00)

(66.33–70.27)

(91.21–107.29)

(7.19–8.48)

(55.02–58.35)

(64.58– 68.49)

(91.51–116.70)

(7.25–9.25)

DS-HA^**

56.58 ± 6.01

68.10 ± 7.94

103.18 ± 40.55

8.13 ± 3.25

56.50 ± 6.45

66.45 ± 7.92

109.50 ± 63.47

8.63 ± 4.97

(55.03–58.14)

(66.05–70.15)

(92.71–113.66)

(7.29–8.97)

(54.83–58.17)

(64.40–68.50)

(93.10–125.90)

(7.35–9.92)