Physiological Demands of Simulated Off-Road Cycling Competition

Table 3. LabT data for three clusters (Good, Medium and Low Performance) consisting of subjects with significantly different racing time (clusters calculated by k-means analysis). Data are shown for variables measured and for performance variables of Laboratory Tests (LabT). For descriptions of variables see Table 1 and Table 2. Values are (means ± SD).

Data determined from Laboratory Testing (LabT)
Variables	Cluster 1 (n = 5) Good Performance	Cluster 2 (n = 12) Medium Performance	Cluster 3 (n = 7) Low Performance
Age (years)	29.8 (7.8	29.4 (7.6)	27.7 (7.1
Height (m)	1.83 (.02)	1.77 (.04)	1.78 (.06)
Weight (kg)	73.4 (1.3) ^a	68.5 (5.1) ^a	69.4 (5.6)
Power output at VT1 (W)	255(29) ^ab	173(22) ^a	160(47) ^b
Power output at the VT1 (W·kg^-1)	3.48 (.28) ^ab	2.54 (.40) ^a	2.31 (.69) ^b
Power output at VT2 (W)	368(26) ^ab	293(14) ^a	262(43) ^b
Power output at VT2 (W·kg^-1)	5.02 (.28) ^ab	4.30 (.44) ^a	3.77 (.56) ^b
Peak VO₂ (ml·kg^-1·min^-1)	74.2 (4.7) ^ab	65.5 (5.0) ^ac	57.3 (3.7) ^bc
VO₂ at VT1 (ml·kg^-1·min^-1)	43.1 (3.5) ^ab	33.2 (4.5) ^a	31.1 (8.4) ^b
VO₂ at VT2 (ml·kg^-1·min^-1)	58.8 (5.2) ^ab	50.4 (4.3) ^a	45.6 (3.7) ^b

^c Medium Performance vs. Low Performance significantly different.^b Good Performance vs. Low Performance significantly different.^a Good Performance vs. Medium Performance significantly different.