Impact of Hot Environment on Fluid and Electrolyte Imbalance, Renal Damage, Hemolysis, and Immune Activation Postmarathon
Table 4
Hematological parameters after the marathon race in the temperate and hot environments.
Reference value
Before
Immediately after
1 day after
3 days after
Erythrocytes (10^6/mm3)
4.5–5.5
HE
5.2 ± 0.1
5.2 ± 0.1
4.9 ± 0.1
4.9 ± 0.1
TE
5.3 ± 0.1
5.1 ± 0.1
4.9 ± 0.1
4.9 ± 0.1
Hemoglobin (g/dL)
13–17
HE
15.4 ± 0.2
15.6 ± 0.2#
14.6 ± 0.2#
14.5 ± 0.1
TE
15.2 ± 0.2
15.0 ± 0.2
14.2 ± 0.2
14.5 ± 0.1
Hematocrit (%)
40–50
HE
47 ± 0.5
46 ± 0.5
44 ± 0.5
45 ± 0.5
TE
47 ± 0.5
46 ± 0.5
44 ± 0.7
45 ± 0.4
Erythropoietin (mU/mL)
4.3–29
HE
12 ± 1
14 ± 1#
14 ± 1
14 ± 1#
TE
11 ± 1
12 ± 1
12 ± 1
13 ± 1
MCV (fL)
80–100
HE
90 ± 1#
89 ± 1
90 ± 1#
89 ± 2
TE
89 ± 1
89 ± 1
89 ± 1
91 ± 1
MCH (pg)
27–32
HE
30 ± 0.2##
30 ± 0.3##
28 ± 1#
30 ± 0.2#
TE
29 ± 0.2
29 ± 0.2
29 ± 0.2
29 ± 0.3
MCHC (g/dL)
31.5–36
HE
33 ± 0.1#
34 ± 0.2#
33 ± 0.2#
33 ± 0.1#
TE
32 ± 0.1
33 ± 0.2
32 ± 0.1
32 ± 0.2
RDW (%)
11.9–15.4
HE
14 ± 0.1##
14 ± 0.1##
14 ± 0.1##
14 ± 0.1##
TE
12 ± 0.1
13 ± 0.1
13 ± 0.1
13 ± 0.1
MCV: mean corpuscular volume; MCH: mean corpuscular hemoglobin; MCHC: mean corpuscular hemoglobin concentration; RDW: red cell distribution width; HE: hot environment; TE: temperate environment. The values are presented as mean ± standard error of mean (SEM) of 26 runners. versus before the race; versus before the race; ; and versus temperate environment.
