Table 2.

Results from tests of H4, from a linear mixed effects model analysis (see Methods), focusing on four kinematic parameters: log velocity (u), log Froude^0.5 ($\hat{u}$), duty factor (DF) and relative stride frequency (RSF) from dataset 3 (fastest running stride per individual); comparing the adjusted means ± standard errors for two groups (“alli-symm” = Alligatoroidea symmetrical gaits; “crocs-asymm” = Crocodyloidea asymmetrical gaits); with p values (bold font for < 0.05). Residual variances were allowed to vary depending on the recording frequency (Hz).

Data	log(u)	log($\stackrel{\mathit{ˆ}}{\mathit{u}}$)	DF	RSF
Alli-symm	1.02 ± 0.10	0.60 ± 0.10	0.49 ± 0.03	0.47 ± 0.03
Crocs-asymm	0.72 ± 0.07	0.28 ± 0.08	0.42 ± 0.02	0.45 ± 0.02
H4: Overall p-value	0.030	0.031	0.075	0.437