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Table 3.

Factor analysis and how variables load on each significant axis after factor rotation

	Factor 1	Factor 2
% Variance explained	67.0%	21.0%
Minimum angle during stroke (deg.)	0.673	–0.726
Maximum angle during stroke (deg.)	0.973	–0.189
Maximum fin depression (cm)	0.801	–0.212
Maximum fin elevation (cm)	0.868	0.470
Maximum posterior fin extension (cm)	0.071	0.829
Maximum anterior fin extension (cm)	–0.873	0.485
Difference in ventral fin area: thrust–recovery (cm²)	0.884	–0.122
Stroke cycle duration (s)	–0.944	0.318
% Stroke duration to maximum fin elevation	–0.661	0.685
% Stroke duration to maximum posterior fin extension	–0.251	0.850

	Factor 1	Factor 2
% Variance explained	67.0%	21.0%
Minimum angle during stroke (deg.)	0.673	–0.726
Maximum angle during stroke (deg.)	0.973	–0.189
Maximum fin depression (cm)	0.801	–0.212
Maximum fin elevation (cm)	0.868	0.470
Maximum posterior fin extension (cm)	0.071	0.829
Maximum anterior fin extension (cm)	–0.873	0.485
Difference in ventral fin area: thrust–recovery (cm²)	0.884	–0.122
Stroke cycle duration (s)	–0.944	0.318
% Stroke duration to maximum fin elevation	–0.661	0.685
% Stroke duration to maximum posterior fin extension	–0.251	0.850

Values in bold indicate strong loading on the axes