Table 3

Iron status, haematological variables, and changes in vascular volumes in untrained (group 1) and trained (group 2) subjects before and after laboratory exercise tests

Test ATest B
BeforeAfterSign.BeforeAfterSign.Normal range
Values are mean (SD).
*Significant difference (Sign.) from pre-test value; †significantly different from group 1 (exercise related changes between trained and untrained). Normal ranges as suggested by the manufacturers of the assay kits.
sTfr, soluble transferrin receptor; PCV, packed cell volume; BV, blood volume; PV, plasma volume; RCV, red cell volume.
Group 1 (untrained; n=12)
    sTfr (mg/l)2.3 (0.4)2.5 (0.5)*2.3 (0.4)2.3 (0.4)0.83–2.76
    Ferritin (ng/ml)107 (64)116 (68)*†94.5 (48)95 (50)12–200
    Transferrin (mg/dl)239 (22)262 (21)*†238 (20)245 (24)*†200–400
    Iron (μg/dl)121 (25)126 (29)92 (22)99 (25)*50–180
    Protein (g/dl)8.0 (0.4)8.7 (0.4)*7.9 (0.3)8.2 (0.3)*6.5–8
    Haemoglobin (g/dl)15.1 (0.8)16.2 (0.9)*14.9 (1.2)15.4 (0.9)*12–18
    PCV (%)46.2 (2.9)49.4 (2.3)*45.7 (3)46.9 (2.2)*37–54
    BV (% change)−6.8 (2.8)*−3.2 (1.6)*
    PV (% change)−12.3 (5.3)*−5.4 (2.9)*
    RCV (% change)−0.3 (0.1)−0.7 (0.1)
Group 2 (trained; n=14)
    sTfr (mg/l)2.5 (0.8)2.7 (0.9)*2.5 (0.72)2.5 (0.7)0.83–2.76
    Ferritin (ng/ml)36 (27)38 (27)*†33 (25)35 (25)*†12–200
    Transferrin (mg/dl)285 (41)316 (45)*†286 (36)297 (29)*†200–400
    Iron (μg/dl)112 (42)124 (47)*91 (33)92 (31)50–180
    Protein (g/dl)7.8 (0.4)8.6 (0.3)*7.8 (0.5)8.3 (0.4)*6.5–8
    Haemoglobin (g/dl)14.7 (0.5)15.6 (0.8)*14.7 (0.6)15.1 (0.8)*12–18
    PCV (%)45.3 (2.1)47.7 (3)44.9 (2.6)46.2 (3)*37–54
    BV (% change)−5.8 (2.0)*−2.6 (1.1)
    PV (% change)−9.9 (3.2)*−4.9 (1.9)*
    RCV (% change)−0.8 (0.2)0.1 (0.0)