Table 1 Descriptive statistics of OPTIMAL-MVPA and LOW-MVPA

BMI, kg/m²

16.4 (15.3; 18.1)

16.5 (15.1; 18.4)

17.0 (12.1; 31.4)

17.2 (11.9; 31.9)

0.783

Light activities, min

295.0

(95.0; 310.0)

250.0

(250.0; 280.0)

211.1

(20.0; 310.0)

260.2

(20.0; 310.0)

 < 0.001

Moderate activities, min

375.0

(330.0; 430.0)

175.0

(150.0; 250.0)

384.5

(140.0; 695.0)

197.1

(60.0; 295.0)

 < 0.001

Vigorous activities, min

0.0 (0.0; 0.0)

0.0(0.0; 0.0)

32.1 (0.0; 160.0)

8.8 (0.0; 120.0)

 < 0.001

Frequency of breakfast^a

3.0 (2.0; 3.0)

3.0 (1.0; 3.0)

2.4 (0.0;3.0)

2.3 (0.0; 3.0)

0.004

Consumption of vegetables, portions/d

2.0 (1.0; 3.0)

2.0 (1.0; 3.0)

2.2 (0.0; 4.0)

2.0 (0.0; 4.0)

0.003

Consumption of fruits, portions/d

2.0 (2.0; 3.0)

2.0 (1.0; 3.0)

2.2 (0.0; 3.0)

2.0 (0.0; 3.0)

 < 0.001

Choice of positive snacks, number^b

1.0 (1.0; 2.0)

1.0 (1.0; 1.0)

1.1 (0.0; 3.0)

1.0 (0.0; 3.0)

0.855

Choice of negative snacks, number^c

1.0 (0.0; 1.0)

1.0 (0.0; 1.0)

0.8 (0.0; 3.0)

0.8 (0.0; 3.0)

0.459

Choice of sugar drinks^d

1.0 (0.0; 2.0)

1.0 (0.0; 2.0)

1.0 (0.0; 2.0)

1.0 (0.0; 2.0)

0.423

Eating in front of the screen^e

1.0 (1.0; 2.0)

1.0 (1.0; 2.0)

1.3 (1.0; 2.0)

1.3 (1.0; 2.0)

0.170

Attention level

7.0 (4.0; 9.0)

7.0 (4.0; 9.0)

6.6 (0.0; 18.0)

6.8 (0.0; 18.0)

0.135

Motor speed, taps/10 s

50.2 (46.2; 54.2)

48.7 (44.8; 52.8)

49.5 (0.2; 72.2)

48.5 (0.0; 73.2)

 < 0.001

Processing speed, correct symbols/2 min

40.0 (35.0; 45.0)

39.0 (34.0; 44.0)

39.8 (0.0; 68.0)

39.4 (0.0; 77.0)

0.210

Processing speed errors, incorrect symbols/2 min

2.0 (0.0; 3.0)

1.0 (0.0; 3.0)

2.9 (0.0; 108.0)

1.8 (0.0; 19.0)

0.080

Executive functions, total correct responses

23.0 (21.5; 23.5)

22.5 (21.5; 23.5)

21.9 (0.0; 24.0)

21.7 (1.0; 24.0)

0.334

Impulsivity, total incorrect responses

1.0 (0.0; 3.0)

1.0 (0.0; 3.0)

5.2 (0.0; 166.0)

5.8 (0.0; 181.0)

0.031