Research Article

Resting Level of Insulin-Like Growth Factor-1 Is Not at Play in Cardiac Enlargement in Endurance-Trained Adolescents

Table 2

Resting levels of circulating hormones in the active group vs controls and at subgroups of boys (b) and girls (g).

Active group (n = 24, 14 boys and 10 girls)Control group (n = 24, 14 boys and 10 girls) value

Cortisol (nmol/L)1361200.421
b125 (40–277)120 (33–286)0.541
g149 (48–305)108 (37–330)0.971
IGF-1 (ng/mL)25230.288
b27 (11–40)25 (14–48)0.427
g21 (11–43)19 (4–29)0.529
IGF-2 (ng/mL)1.00.00.134
b1.1 (0.0–2.8)0.0 (0.0–8.0)0.454
g0.5 (0.0–5.0)0.0 (0.0–3.0)0.315
FSH (mLU/mL)7.45.70.177
b6.3 (1.8–12.1)4.1 (1.4–9.1)0.137
g7.8 (3.6–17.9)6.3 (3.8–11.9)0.684
GH (ng/mL)1.42.00.327
b1.5 (0.1–26.1)3.2 (0.2–28.6)0.571
g1.1 (0.6–6.4)1.8 (0.5–13.8)0.315
LH (mLU/mL)2.11.40.095
b2.2 (0.7–11.5)0.7 (0.0–4.6)0.031
g2.1 (1.2–28.0)2.0 (0.6–6.1)0.796
Prolactin (ng/mL)1.50.90.049
b1.6 (0.3–4.8)0.9 (0.0–4.3)0.039
g1.2 (0.3–5.5)0.9 (0.0–2.8)0.481
TSH (μLU/mL)2.62.80.877
b2.7 (1.1–10.6)2.8 (1.2–12.0)0.910
g2.6 (0.8–11.0)2.5 (1.3–9.8)0.796

Data are presented as median with range (min-max). Bold styling denotes statistical significance. IGF, insulin-like growth factor; FSH, follicle-stimulating hormone; GH, growth hormone; LH, luteinizing hormone; TSH, thyroid-stimulating hormone.