Table 4. Effects of the period of match congestion on soccer players’ hematological parameters.
| Hematological parameters | Pre-testing (T1) | Post-testing (T2) | p-value | Effect size (ES) |
|---|---|---|---|---|
| Erythrocytes (M/mm3) | 5.3 ± 0.4 | 5.1 ± 0.3 | 0.018* | 0.5 |
| Hemoglobin (g/dl) | 14.9 ± 1.04 | 14.3 ± 0.7 | 0.002* | 0.8 |
| Hematocrit (%) | 43.9 ± 2.7 | 42.5 ± 2.07 | 0.0006* | 0.6 |
| MCV (fl) | 83.1 ± 4.5 | 82.9 ± 4.5 | 0.1 | 0.3 |
| MCHC (pg) | 28.05 ± 1.7 | 28.09 ± 1.6 | 0.4 | 0.1 |
| MHC (%) | 33.9 ± 0.7 | 33.7 ± 0.6 | 0.1 | 0.3 |
| PV (T1-T2) (%) | 6.1±8.7% | 0.01* | 0.7 | |
MCV: Mean corpuscular volume, MCHC: Mean corpuscular hemoglobin content, MHC: Mean hemoglobin concentration, PV (T1-T2): Plasma volume variation between T1 and T2; YYIR1: yoyo intermittent recovery test Level 1, RSSA: repeated sprint shuttle ability, SJ: squat jump, CMJ: countermovement jump.
* = Significant difference between T1 (before the period of match congestion) and T2 (after the period of match congestion).