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Table 2 Descriptive statistics for handgrip strength (kg) stratified by age, hand dominance, and gender

From: Normative data for handgrip strength in Iranian healthy children and adolescents aged 7–18 years: comparison with international norms

Age (years) Hand Mean ± SD (Min-Max)  
Boys Girls
7 D 9.9 ± 2.48 (7.1–13.9) 8.4 ± 2.21 (6.1–13.8)
ND 9.1 ± 2.61 (6.6–12.8) 7.5 ± 2.32 (5.3–12.9)
8 D 11.6 ± 2.51 (8.3–14.6) 9.8 ± 3.10 (7.6–15.1)
ND 10.8 ± 2.93 (8.4–13.7) 8.9 ± 3.21 (6.9–15.2)
9 D 13.7 ± 3.82 (11.2–17.9) 11.6 ± 3.21 (8.4–16.3)
ND 12.4 ± 3.61 (10.8–17.2) 10.5 ± 3.73 (8.2–15.7)
10 D 15.9 ± 2.87 (12.7–19.3) 13.4 ± 3.31 (10.7–18.4)
ND 14.4 ± 2.35 (12.1–18.7) 12.2 ± 2.92 (10.6–17.8)
11 D 18.4 ± 4.15 (13.4–25.2) 16.1 ± 3.61 (12.7–20.1)
ND 16.8 ± 3.95 (13.0–23.6) 14.6 ± 4.12 (13.0–19.4)
12 D 21.5 ± 4.07 (16.7–26.9) 18.0 ± 3.73 (14.3–20.6)
ND 19.7 ± 4.25 (15.8–24.7) 16.4 ± 3.27 (15.0–21.2)
13 D 25.8 ± 4.42 (19.8–30.9) 20.0 ± 3.66 (16.6–25.7)
ND 24.1 ± 4.37 (20.1–31.0) 19.2 ± 3.37 (16.0–24.3)
14 D 30.6 ± 4.34 (24.2–37.0) 21.5 ± 3.82 (16.8–27.5)
ND 28.8 ± 4.13 (23.4–33.7) 21.1 ± 3.79 (16.6–29.2)
15 D 35.1 ± 4.73 (29.3–40.6) 22.8 ± 3.77 (17.7–26.7)
ND 33.1 ± 4.28 (27.3–38.5) 21.7 ± 3.47 (16.5–28.1)
16 D 38.4 ± 3.79 (32.0–42.8) 23.7 ± 3.45 (20.1–28.0)
ND 35.7 ± 3.61 (29.2–40.2) 22.6 ± 3.51 (19.4–28.6)
17 D 41.6 ± 4.13 (35.6–48.7) 24.0 ± 3.20 (19.7–29.0)
ND 38.6 ± 4.27 (33.4–45.1) 22.5 ± 3.25 (19.0–28.4)
18 D 42.8 ± 4.11 (33.6–47.6) 24.3 ± 3.71 (20.0–30.4)
ND 39.6 ± 4.55 (34.8–44.5) 22.7 ± 3.60 (18.6–29.8)
Total D 25.6 ± 3.85 (7.1–48.7) 17.8 ± 3.27 (6.1–30.4)
ND 23.3 ± 4.10 (6.6–45.1) 16.6 ± 3.12 (5.3–29.8)
  1. D: Dominant hand, ND: Non-dominant hand