Table 1 Characteristics of study participants.

From: Maximizing plyometric training for adolescents: a meta-analysis of ground contact frequency and overall intervention time on jumping ability: a systematic review and meta-analysis

Studies

Genders

Sample size

Age

Experimental group

Control group

PT

CON

PT

CON

Interventions

PT Duration

Frequency

Duration

TGCF

OIT

Interventions

Asadi 2018(PRE-PHV)79

Male

10

10

11.5 ± 0.8

11.7 ± 0.4

PT + Soccer

30–40 min

2 week

6 weeks

720

420

Soccer

Asadi 2018 (Mid-PHV)79

Male

10

10

14.0 ± 0.7

14.2 ± 0.6

PT + Soccer

30–40 min

2 week

6 weeks

720

420

Soccer

Asadi 2018 (POST-PHV)79

Male

10

10

16.6 ± 0.6

16.2 ± 0.3

PT + Soccer

30–40 min

2 week

6 weeks

720

420

Soccer

Attene 201580

Female

18

18

14.83 ± 0.92

15.20 ± 0.92

PT + Basketball

20 min

2 week

6 weeks

1120

240

Basketball

Carlos 202281

Male – Female

44

39

10.7 ± 0.4

10.8 ± 0.5

PT + PE

30 min

2 week

8 weeks

–

480

PE

Chelly 201482

Male

12

11

17.1 ± 0.3

17.2 ± 0.4

PT + Handball

30 min

2 week

8 weeks

860

480

Handball

Chelly 201583

Male

14

13

11.7 ± 1.0

12.1 ± 1.0

PT + Track and Field

20 min

3 week

10 weeks

–

600

Track and Field

de Villarreal 202184

Male

10

10

13.57 ± 1.39

14.66 ± 0.86

PT + Basketball

20 min

2 week

7 weeks

1960

280

Basketball

Drouzas 202085

Male

23

22

10.0 ± 0.5

10.2 ± 1.6

PT + Soccer

15 min

2 week

10 weeks

1440

300

Soccer

Du 202086

Male – Female

13

13

17.31 ± 0.48

17.23 ± 0.44

PT + Latin dance

90 min

3 week

8 weeks

2096

720

Latin dance

Fathi 201887

Male

20

20

14.6 ± 0.5

14.5 ± 0.6

PT + Volleyball

20 min

2 week

16 weeks

1184

640

Volleyball

Fischetti 201888

Male

10

12

13.7 ± 0.5

13.5 ± 0.5

PT + Track and Field

90 min

2 week

8 weeks

–

240

Track and Field

Hall 201689

Female

10

10

12.5 ± 1.67

12.5 ± 1.67

PT + Gymnastics

60 min

2 week

6 weeks

1114

720

Gymnastics

Hammami 201990

Male

14

12

15.7 ± 0.2

15.8 ± 0.2

PT + Soccer

35 min

2 week

8 weeks

722

560

Soccer

Hernández 201891

Male

7

6

10.0 ± 1.5

9.7 ± 2.0

PT + Basketball

40 min

2 week

7 weeks

–

560

Basketball

Idrizovic 201892

Female

13

17

16.6 ± 0.6

16.6 ± 0.7

PT + Volleyball

20–30 min

2 week

12 weeks

1226

540

Volleyball

Ignacio 2021 (NPPT)93

Male

8

7

13.8 ± 2.0

14.1 ± 0.2

PT + Basketball

–

2 week

6 weeks

2304

–

Basketball

Ignacio 2021 (PPT)93

Male

7

7

14.6 ± 1.1

14.0 ± 2.0

PT + Basketball

–

2 week

6 weeks

2304

–

Basketball

Jlid 201994

Male

14

14

11.8 ± 0.4

11.6 ± 0.5

PT + Soccer

20–25 min

2 week

8 weeks

1596

360

Soccer

Kosova 202295

–

14

12

15.16 ± 0.74

15.22 ± 0.86

PT + Fencing

–

3 week

8 weeks

1980

–

Fencing

Lioyd 2016 (PRE-PHV)2

Male

10

10

12.7 ± 0.3

12.7 ± 0.3

PT + PE

–

2 week

6 weeks

958

–

PE

Lioyd2016(POST-PHV)2

Male

10

10

16.4 ± 0.2

16.2 ± 0.3

PT + PE

–

2 week

6 weeks

958

–

PE

Marta 202281

Male – Female

41

39

10.84 ± 0.47

10.84 ± 0.47

PT + PE

30 min

2 week

8 weeks

–

480

PE

Marzouki 2022 (Boys)96

Male – Female

20

20

10.1 ± 1.2

10.0 ± 1.2

PT + PE

–

2 week

4 weeks

676

–

PE

Marzouki 2022 (Girls)96

Male – Female

20

20

10.0 ± 1.1

10.1 ± 1.1

PT + PE

–

2 week

4 weeks

676

–

PE

Meszler 201997

Female

9

9

15.8 ± 1.2

15.7 ± 1.3

PT + Basketball

20 min

2 week

7 weeks

1027

280

Basketball

Michailidis 201398

Male

24

21

10.6 ± 0.6

10.6 ± 0.5

PT + Soccer

20–25 min

2 week

12 weeks

–

660

Soccer 

Negra 2020 (4 weeks)64

Male

11

11

12.7 ± 0.3

12.8 ± 0.3

PT + Soccer

35–40 min

2 week

4 weeks

–

300

Soccer

Negra 2020 (8 weeks)64

Male

11

11

12.7 ± 0.12

12.8 ± 0.12

PT + Soccer

35–40 min

2 week

8 weeks

–

600

Soccer

Negra 2020 (12 weeks)64

Male

11

11

12.7 ± 0.13

12.8 ± 0.13

PT + Soccer

35–40 min

2 week

12 weeks

–

900

Soccer

Nurper 201499

Female

9

9

18.3土2.6

18.0土2.0

PT + Soccer

60 min

1 week

8 weeks

1210

480

Soccer

Padrón-Cabo 2021100

Male

10

10

12.60 ± 0.70

12.39 ± 0.56

PT + Soccer

20–35 min

2 week

6 weeks

512

270

Soccer

Potdevin 2011101

Male – Female

12

11

14.3 ± 0.2

14.1 ± 0.2

PT + Swimming

20–25 min

2 week

6 weeks

2146

270

Swimming

Ramirez-Campillo 2018(FIXED)20

Male

25

24

13.9 ± 1.9

13.7 ± 1.6

PT + Soccer

13 min

2 week

7 weeks

906

182

Soccer

Ramirez-Campillo 2018(OPT)20

Male

24

24

13.1 ± 1.7

13.7 ± 1.6

PT + Soccer

13 min

2 week

7 weeks

906

182

Soccer

Ramirez-Campillo 2019102

Male

19

20

13.2 ± 1.8

13.5 ± 1.9

PT + Soccer

20 min

2 week

7 weeks

840

280

Soccer

Ramirez-Campillo 2020103

Male

8

7

12.9 ± 1.9

12.6 ± 1.8

PT + Soccer

10–15 min

2 week

8 weeks

810

200

Soccer

Ramirez-Campillo 2020(After)104

Male

14

12

17.1 ± 0.3

17.1 ± 0.5

PT + Soccer

20 min

2 week

7 weeks

1404

280

Soccer

Ramirez-Campillo 2020(Before)104

Male

12

12

16.9 ± 0.7

17.1 ± 0.5

PT + Soccer

20 min

2 week

7 weeks

1404

280

Soccer

Romero 2021(7th-grade)105

Female

10

9

12.7 ± 0.6

12.8 ± 0.6

PT + PE

21 min

2 week

6 weeks

1590

252

PE

Romero 2021(10th-grade)105

Female

9

9

16.3 ± 0.5

16.2 ± 0.5

PT + PE

21 min

2 week

6 weeks

1590

252

PE

Sammoud 2019106

Male

14

12

10.3 ± 0.4

10.5 ± 0.4

PT + Swimming

25–30 min

2 week

8 weeks

1360

440

Swimming

Sammoud 2021107

Female

12

10

10.01 ± 0.57

10.50 ± 0.28

PT + Swimming

25–30 min

2 week

8 weeks

1360

440

Swimming

Sedano 2011108

–

11

11

18.4 ± 1.1

18.2 ± 0.9

PT + Soccer

–

3 week

10 weeks

2880

–

Soccer

Tottori 2019109

Male

11

15

10.3 ± 0.7

10.9 ± 0.9

PT + PE

60 min

1 week

8 weeks

795

480

PE

Uzelac-Sciran 2020 (PRE-PHV)110

Male

24

19

13.1 ± 0.6

13.2 ± 0.5

PT + PE

40 min

2 week

8 weeks

1336

640

PE

Uzelac-Sciran 2020 (POST-PHV)110

Male

33

8

14.0 ± 0.4

13.9 ± 0.5

PT + PE

40 min

2 week

8 weeks

1336

640

PE

Vera-Assaoka 2019(early)7

Male

16

16

11.2 ± 0.8

11.5 ± 0.9

PT + Soccer

21 min

2 week

7 weeks

840

294

Soccer

Vera-Assaoka 2019(late)7

Male

22

22

14.4 ± 1.0

14.5 ± 1.1

PT + Soccer

21 min

2 week

7 weeks

840

294

Soccer

Zribi 2014111

Male

25

26

12.1 ± 0.6

12.2 ± 0.4

PT + Basketball

15–20 min

2 week

9 weeks

–

315

Basketball

  1. PT plyometric training, CON control group, CMJ countermovement jump, SJ squat jump, TGCF total ground contact frequency, OIT overall intervention time, PE physical education, min minute, PPT progressed plyometric training, NPPT non-progressed plyometric training, FIXED fixed drop-box height, OPT optimal drop-box height, After plyometric training applied after soccer practice, Before plyometric training applied before soccer practice, early tanner stage maturation of 1–3, late tanner stage maturation of 4–5.