Table 3 Summary of training studies per hormone (GH, IGF-I, testosterone, SHBG, and cortisol) reported separately for sex, age, and maturity

GH

Total number of studies

3

1

1

3

1

3

Resistance Training (studies)

0

0

0

0

0

0

Endurance training (studies)

3

1

1

3

1

3

Age (min–max)

10–16 year

15–17 year

10 year

13–17 year

10 year

13–17 year

Maturity reported (studies)

2/3

1/1

1/1

2/3

IGF-I

Total number of studies

2

2

2

2

2

2

Resistance Training (studies)

0

0

0

0

0

0

Endurance training (studies)

2

2

2

2

2

2

Age (min–max)

9–16 year

9–17 year

9–11 year

15–17 year

9–11 year

15–17 year

Maturity reported (studies)

2/2

2/2

2/2

2/2

Testosterone

Total number of studies

7

0

4*

3

5*

3

Resistance Training (studies)

4

0

2

2

2**

2

Endurance training (studies)

3

0

2

2*

3

1

Age (min–max)

10–17 year

0

11–12 year

13–17 year

9–11 year

12–17 year

Maturity reported (studies)

6/7

0

4/4

2/3

SHBG

Total number of studies

3

0

2

1

2

1

Resistance Training (studies)

2

0

0

1

0

1

Endurance training (studies)

1

0

2

0

2

0

Age (min–max)

10–16 year

0

9–12 year

14–16 year

9–12 year

14–16 year

Maturity reported (studies)

3/3

0

2/2

1/1

Cortisol

Total number of studies

5

0

1

4

1

1

Resistance Training (studies)

3

0

0

3

0

1

Endurance training (studies)

2

0

0

1

1

0

Age (min–max)

9–17 years

0

9–10 years

14–17 years

9–10 years

14–15 years

Maturity reported (studies)

2/5

0

1/1

¼