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Table 4 Change of BDNF, IGF-1, working-memory and VO2max after 12 weeks aerobic exercise mean ± SD (n = 10)

From: The effect of exercise intensity on brain derived neurotrophic factor and memory in adolescents

Variables

Group

LIEG(a)

MIEG(b)

HIEG(c)

SG(d)

F

Bonferroni’s

BDNF (ng/ml)

pre

24.79 ± 25.77

25.90 ± 26.59

25.24 ± 34.17

23.96 ± 20.93

G:3.602*

T:22.905***

GxT:7.283**

c > a

post

25.05 ± 21.47

27.71 ± 25.86

30.09 ± 48.00

24.50 ± 22.04

t

−0.868

−2.262#

−4.368##

−0.792

IGF-1 (ng/ml)

pre

389.20 ± 21.23

405.60 ± 45.61

401.00 ± 13.30

386.30 ± 39.63

G:1.699

T:3.702

GxT:1.457

NS

post

393.30 ± 37.97

400.60 ± 42.52

432.60 ± 39.40

409.01 ± 18.47

t

−0.309

0.275

−2.464#

−2.268#

Cortisol (μg/dL)

pre

12.93 ± 3.92

13.62 ± 4.07

13.36 ± 3.73

13.42 ± 3.28

G:1.999

T:3.984

GxT:1.437

NS

post

11.02 ± 2.12

11.19 ± 2.31

9.71 ± 3.21

12.72 ± 3.28

t

0.988

1.022

2.834#

0.743

working-memory (score)

pre

19.80 ± 1.22

19.60 ± 1.34

21.20 ± 1.31

20.70 ± 1.76

G:9.604***

T:9.373**

GxT:6.092**

c > a,d

post

20.00 ± 1.49

22.10 ± 2.80

24.20 ± 3.48

19.70 ± 2.00

t

−0.391

−2.092

−4.881##

1.861

  1. LIEG low intensity aerobic exercise group, MIEG moderate intensity aerobic exercise group, HIEG high intensity aerobic exercise group, SG stretching group (control group)
  2. #: significantly different within group by paired t-test, #: p < 0.05, ##: p < 0.01
  3. *: significantly group, time and group x time interaction effects by Two-way repeated ANOVA test *: p < 0.05, **: p < 0.01, ***: p < 0.001
  4. LIEG(a) HIEG(c), SG(d), post-hoc tests by Bonferroni's