Table 3 Maternal BMI before pregnancy in association with physical activity and fitness among adolescents. Mean differences (95% CI) of physical activity (METh/week) and cardiorespiratory fitness (ml·kg⁻¹·min⁻¹) in adolescents whose mothers were underweight, overweight, or obese before pregnancy compared with offspring of normal weight mothers

Physical activity (METh/week)

N = 1594

N = 3881

N = 829

N = 229

1

−0.4 (−1.4;0.6)

Mean 31.0 (SD 16.9)

−0.6 (−1.9;0.6)

−3.4 (−5.6;-1.2)*

2

−0.3 (−1.3;0.6)

−0.3 (−1.5;1.0)

−2.7 (−5.0;−0.5)*

3a

-0.5 (−1.5;0.5)

0.7 (−0.7;2.2)

−1.6 (−4.0;0.7)

3b

−0.2 (−1.2;0.7)

−0.0 (−1.3;1.2)

−2.2 (−4.4;0.0)

3c

−0.1 (−1.1;1.0)

−0.2 (−1.5;1.0)

−2.3 (−4.5;0.0)*

Cardiorespiratory fitness (ml·kg⁻¹·min⁻¹)

N = 1122

N = 2760

N = 576

N = 148

1

0.6 (0.0;1.2)*

Mean 42.6 (SD 10.7)

−1.3 (−2.1;-0.6)**

−2.2 (−3.6;-0.9)**

2

0.6 (0.1;1.2)*

−1.2 (−2.0;-0.5)**

−2.0 (−3.4;-0.6**

3a

0.5 (−0.1;1.1)

−0.8 (−1.7;0.1)

−1.5 (−2.9;0.0)

3b

0.6 (0.1;1.2)*

−1.2 (−1.9;-0.4)**

−1.9 (−3.3;−0.5)**

3c

0.0 (−0.5;0.5)

-0.5 (−1.3;0.2)

0.3 (−1.0;1.6)