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)