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Table 4 PCA component matrix (peak values)

From: Ventilatory response to exercise of elite soccer players

  Component
  1 2 3
V ˙ O 2 peak 0.950 0.014 0.081
V ˙ O 2 peak 0.859 −0.217 −0.088
V ˙ O 2 peak / H R peak 0.853 −0.182 0.305
V ˙ E peak 0.720 0.147 −0.518
RR peak −0.305 0.362 −0.665
HR peak −0.180 0.406 −0.304
BRR −0.197 0.675 0.688
(V d /V t ) peak −0.341 −0.545 0.301
FEV 1 0.432 0.817 0.214