Table 1. Mean (±SD) capillary blood pH, Bicarbonate (HCO), haematocrit (Hct), haemoglobin (Hb), Sodium (Na) and Potassium (K) in response to on-court conditioning drills in the heat with and without pre-cooling.
Measure |
Condition |
Pre |
Post |
pH (au) |
Cooling |
7.43 (.04) |
7.32 (.04) |
Control |
7.42 (.04) |
7.31 (.04) |
HCO3 (mmol.L-1) |
Cooling |
23.7 (2.5) |
12.7 (1.9) |
Control |
24.1 (2.3) |
13.1 (2.3) |
Hct (%) |
Cooling |
.49 (.03) |
.48 (.06) |
Control |
.48 (.04) |
.50 (.04) |
Hb (g.mL-1) |
Cooling |
16.5 (.9) |
16.3 (1.9) |
Control |
16.3 (1.2) |
17.1 (1.2) |
Na+ (mmol.L-1) |
Cooling |
143 (2) |
148 (2) |
Control |
143 (2) |
147 (2) |
K+ (mmol.L-1) |
Cooling |
3.8 (.4 ) |
4.0 (.5) |
Control |
4.0 (.5) |
4.6 (.6) |
No significant difference between conditions for any measure (p > 0.05)