Table 1

 Coefficient of variation (CV) of selected parameters between two tennis specific incremental field tests (FT) performed within 4 days (n = 4)

ParameterFT 1FT 2CV (%)
Values are mean (SD). HRmax, maximum heart rate; [La], blood lactate concentration; RCP, respiratory compensation point; RPE, rating of perceived exertion; Te, time to exhaustion; VO2max, maximum oxygen uptake, VT, ventilatory threshold.
Te (s)1479 (68)1454 (103)1.2
VO2max (ml/min/kg)57.4 (6.4)58.2 (6.5)1.0
HRmax (bpm)194.3 (6.7)187.3 (1.2)2.6
[La] (mmol/l)8.0 (2.8)7.4 (2.1)5.2
RPE (points)17.3 (1.2)16.7 (1.5)2.8
VT (%VO2max)73.7 (3.9)70.9 (8.7)2.7
VT (%HRmax)84.8 (3.9)87.5 (2.6)2.2
RCP (%VO2max)90.3 (4.5)86.5 (8.0)3.0
RCP (%HRmax)94.0 (2.7)93.6 (1.6)0.3