Table 1.

Linear mixed modelling of consumed metabolic energy and mechanical power relationship.

Parameter	Estimate	Est.Error	${\mathit{CI}}_{\mathit{lower}}$	${\mathit{CI}}_{\mathit{upper}}$	Effects
Intercept	−8.530	8.842	−27.898	7.197	Population-level effects
Mechanical power	0.081	0.018	0.035	0.111	Population-level effects
sd(Intercept)	15.234	7.535	3.123	32.769	Group-level effects
sd(mechanical power)	0.029	0.019	0.004	0.078	Group-level effects
cor(Intercept,mechanical power)	−0.492	0.428	−0.949	0.658	Group-level effects
sigma	2.410	0.346	1.853	3.204	Family specific parameters