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Table 2 Muscle strength in relation to Fat Mass Index category at baseline, N=1036

From: Knee pain in young adult women- associations with muscle strength, body composition and physical activity

 

Normal weight

(FMI ≤ 9 kg/m2)

Overweight

(FMI >9-13 kg/m2)

Obese

(FMI >13 kg/m2)

P-value*

790

76%

187

18%

59

6%

Knee extensor (BL)

 Absolute strength (Nm)

139.1 a

(25.4)

148.4 b

(26.8)

157.4 b

(38.3)

<0.001

 Weight-adjusted strength (%)

230.2 a

(33.6)

203 a

(28.9)

170.3 a

(34.9)

<0.001

Knee flexor (BL)

 Absolute strength (Nm)

70.7 a

(14.9)

75.1 b

(16.3)

78.1 b

(19.2)

<0.001

 Weight-adjusted strength (%)

117 a

(20.8)

102.8 a

(19.5)

85.2 a

(21.3)

<0.001

  1. Reported values are mean (SD)
  2. *P-value between groups, One-way ANOVA and Tukey post hoc test
  3. a Significantly different from both other groups;
  4. b Significantly different from the normal weight group