Table 2 Cervical isometric neck strength (kg)

Flexion

30.92 (5.20)

32.00 (5.60)

28.54 (3.98)

0.079

Extension

43.39 (6.39)

44.92 (7.12)

39.52 (5.12)

0.035^‡

Left side flexion

40.54 (6.97)

42.90 (7.70)

35.02 (4.50)

0.003^‡

Right side flexion

40.34 (7.60)

43.15 (7.58)

35.03 (4.53)

0.002^‡

Left rotation

36.09 (6.15)

37.56 (6.96)

33.08 (3.31)

0.006^‡

Right rotation

36.69 (5.38)

38.55 (5.52)

33.46 (3.04)

0.038^‡