Table 2. Mean values ± SD for the incremental SpeedCourt (SC) test and its test–retest reliability with intraclass correlation coefficient (ICC), typical error (TE), coefficient of variation (CV%), and minimal detectable change (MDC)
ParameterIncremental SC testICCTECV%MDC
Trial 1Trial 2
Peak values
Time to exhaustion (min: sec)18:44 ± 02:1119:24 ± 01:360.85 (0.70–0.92)0.44 (0.35–0.61)3.8875
Oxygen uptake (mL kg−1 min−1)53.8 ± 4.853.3 ± 4.20.84 (0.69–0.92)0.45 (0.36–0.62)2.744
Heart rate (1 min−1)185.1 ± 7.8182.2 ± 8.20.72 (0.49–0.85)0.64 (0.51–0.87)2.038
Blood lactate concentration (mmol L−1)6.2 ± 2.45.8 ± 2.10.69 (0.43–0.83)0.70 (0.55–0.95)16.033
Ventilation (L min−1)137.1 ± 20.3134.5 ± 17.70.89 (0.78–0.94)0.36 (0.29–0.50)4.5214
Respiratory exchange ratio (a.u.)1.08 ± 0.071.10 ± 0.050.57 (0.24–0.76)0.90 (0.72–1.24)3.730
Breathing frequency (1 min−1)58.7 ± 6.758.1 ± 8.60.77 (0.57–0.88)0.56 (0.45–0.77)4.356
Ratings of perceived exertion (a.u.)18.3 ± 1.118.2 ± 1.20.37 (−0.03–0.63)1.34 (1.07–1.84)3.602
5 min post
Oxygen uptake (mL kg−1 min−1)24.6 ± 6.022.3 ± 4.90.85 (0.71–0.92)0.43 (0.34–0.60)9.634
Heart rate (1 min−1)135.3 ± 12.1128.0 ± 9.10.78 (0.57–0.88)0.56 (0.44–0.76)4.489
Blood lactate concentration (mmol L−1)5.4 ± 2.35.3 ± 2.10.51 (0.16–0.72)1.01 (0.80–1.38)20.043
Ventilation (L min−1)55.6 ± 13.851.1 ± 11.80.88 (0.76–0.94)0.38 (0.31–0.53)8.968
Respiratory exchange ratio (a.u.)0.87 ± 0.040.89 ± 0.060.75 (0.53–0.87)0.59 (0.47–0.81)2.800
Breathing frequency (1 min−1)38.2 ± 7.036.6 ± 7.40.86 (0.72–0.92)0.42 (0.34–0.58)6.826
Ratings of perceived exertion (a.u.)11.2 ± 2.211.6 ± 2.30.58 (0.26–0.77)0.88 (0.70–1.20)8.413
  • The ICC and TE are indicated with corresponding 90% confidence limits.