Groups

Before

intervention

After

intervention

Δ

K1

17.37 ± 2.83

12.05 ± 2.69

−5.33 ± 3.55

K2

14.90 ± 2.95

17.44 ± 3.34

2.54 ± 4.01

K3

15.06 ± 2.76

11.34 ± 2.91

−3.71 ± 4.98

K4

13.81 ± 2.92

10.30 ± 1.65

−3.51 ± 2.76

K5

15.69 ± 3.2

14.30 ± 1.48

−1.39 ± 4.34

K6

16.24 ± 4.47

10.21 ± 5.20

-4.19 ± 5.34