Table 2

 Physiological responses to matches played on hard and clay courts

Hard courtClay court
Mean (SD)Min–maxMean (SD)Min–max
Values (n = 6) presented are mean (SD), minimum and maximum. Equipment failure hampered the collection of creatine kinase during the hard court tournaments.
*Significant difference between the hard and clay court tournaments (p<0.05).
BGL, blood glucose; CK, creatine kinase.
Peak core temperature (°C)38.9 (0.3)38.6–39.338.5 (0.6)37.9–39.5
Sweat rate (kg.h−1)2.04 (0.44)1.53–2.771.51 (0.32)1.08–1.86
Body mass deficit (%)1.05 (0.49)*0.39–1.590.32 (0.56)−0.47–0.95
Fluid consumed vs fluid lost (%)77 (12)63–9089 (26)68–133
Average heart rate (beats/min)152 (15)137–173146 (19)130–167
Pre-match BGL (mmol·l−1)5.2 (0.6)4.5–5.76.4 (2.4)3.8–10.4
Post-match BGL (mmol·l−1)6.7 (2.2)3.6–8.68.4 (1.9)6.3–11.1
Pre-match CK (μmol·l−1)255 (73)134–344
Post-match CK (μmol·l−1)312 (87)161–414
Pre-match creatinine (μmol·l−1)70 (7)60–7981 (6)71–89
Post-match creatinine (μmol·l−1)87 (14)70–10796 (8)90–113
Pre-match urea (mmol·l−1)5.6 (1.0)4.4–7.06.3 (0.5)5.4–6.9
Pre-match uric acid (μmol·l−1)321 (89)176–385342 (43)298–412
Urine specific gravity1.023 (0.004)1.015–1.0251.021 (0.004)1.017–1.028