Table 1 Characteristics of participants (Age, Gender), and mean, standard deviation and range of grip strength in dominant hand (N = 237)

6–7

10

128

47

73–227

7

103

27

69–141

8–9

17

182

50

78–273

9

161

32

98–200

10–11

26

199

56

121–325

12

204

42

142–290

12–13

28

256

72

140–467

17

230

48

155–328

14–15

11

383

138

209–660

12

296

34

232–348

16–17

5

366

119

223–554

10

293

49

216–366

18–19

9

507

155

237–755

4

302

17

291–327

20–24

18

476

80

333–581

15

311

67

169–455

25–29

11

526

139

344–735

10

303

68

165–414

30–34

4

614

129

463–764

2

334

27

314–353

Total

139

98