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Table 2 Isometric strength characteristics per player position

From: The isometric and isokinetic knee extension and flexion muscle strength profile of elite soccer players

 

Leg

GK (n = 33)

CD (n = 72)

ED (n = 54)

CM (n = 99)

EM (n = 46)

S (n = 59)

Quadriceps in 90° (Nm/kg)

Dǂ

3.47 ± 0.47 (2.4–4.2)

3.51 ± 0.68 (2.4–5.3)

3.61 ± 0.61 (2.4–5.2)

3.50 ± 0.63 (2.0–5.5)

3.56 ± 0.92 (1.9–5.9)

3.77 ± 0.72 (1.9–5.0)

ND

3.47 ± 0.55 (2.6–4.6)

3.43 ± 0.66 (2.1–5.3)

3.53 ± 0.54 (2.4–4.5)

3.48 ± 0.55 (2.0–5.3)

3.48 ± 0.74 (2.1–5.2)

3.60 ± 0.82 (1.7–5.5)

Hamstrings in 45° (Nm/kg)

Dǂ

1.91 ± 0.23 (1.3–2.7)

1.89 ± 0.29 (1.1–2.4)

1.89 ± 0.31 (1.1–2.5)

1.88 ± 0.32 (1.1–2.9)

1.76 ± 0.32 (0.8–2.5)

1.90 ± 0.34 (1.3–2.6)

ND

1.80 ± 0.22 (1.2–2.3)

1.79 ± 0.28 (0.9–2.5)

1.87 ± 0.33 (0.9–2.5)

1.77 ± 0.34 (1.0–3.0)

1.73 ± 0.31 (1.0–2.3)

1.84 ± 0.38 (1.2–3.0)

H/Q ratio (%)

Dǂ

57 ± 11 (38–77)

55 ± 11 (35–91)

54 ± 9 (34–85)

54 ± 12 (35–97)

52 ± 14 (30–103)

52 ± 13 (36–92)

ND

53 ± 10 (37–74)

54 ± 13 (32–86)

54 ± 10 (28–72)

52 ± 10 (32–81)

51 ± 11 (27–72)

53 ± 13 (34–94)

  1. Data are presented as means ± SD’s and represent isometric peak torque values (in Nm/kg), ranges (min-max values) and ratios (peak strength of m.Hamstrings divided by peak strength of m. Quadriceps, in %) of m. Quadriceps and m. Hamstrings of the dominant (D) and non-dominant (ND) leg, per player positions following 2 maximal isometric contractions (4 s) in a 45° (M. Hamstrings) or 90° (m. Quadriceps) knee-angle (relative to the horizontal plane). ǂp < 0.05 compared to the opposite leg in all groups