Table 4.

Multilevel regression models for 11–16-year-old girls for treadmill-determined and cycle ergometer-determined peak oxygen uptake

Parameter	Loge treadmill-determined peak oxygen uptake			Loge cycle ergometer-determined peak oxygen uptake
	Model 4.1	Model 4.2	Model 4.3	Model 4.4	Model 4.5	Model 4.6
Fixed Part	Estimate (SE)	Estimate (SE)	Estimate (SE)	Estimate (SE)	Estimate (SE)	Estimate (SE)
Constant	− 1.776 (0.156)	− 1.808 (0.145)	− 2.011 (0.169)	− 1.562 (0.244)	− 1.699 (0.167)	− 1.974 (0.184)
Loge Body mass	0.661 (0.040)	0.770 (0.043)	–	0.569 (0.062)	0.727 (0.050)	–
Agea	ns	ns	ns	ns	ns	ns
Age2	ns	ns	ns	ns	ns	ns
Maturity stage 2	ns	ns	ns	ns	ns	ns
Maturity stage 3	ns	ns	ns	ns	ns	ns
Maturity stage 4	ns	ns	ns	ns	ns	ns
Maturity stage 5	ns	ns	ns	ns	ns	ns
Loge Skinfolds	–	− 0.121 (0.027)	–	–	− 0.148 (0.031)	–
Loge FFMb	–	–	0.782 (0.047)	–	–	0.732 (0.051)
Random Part
Level 2
Var(cons)	0.005 (0.001)	0.004 (0.001)	0.005 (0.001)	0.008 (0.002)	0.006 (0.001)	0.007 (0.002)
Level 1
Var(cons)	0.003 (0.000)	0.003 (0.000)	0.003 (0.000)	0.004 (0.001)	0.004 (0.001)	0.003 (0.001)
Units: Level 2	64	64	64	64	64	64
Units: Level 1	150	150	150	150	150	150
− 2 × log-likelihood	− 339.394	− 357.845	340.974	− 298.336	− 318.222	− 315.777

Values are model estimates (standard error)

All models founded on 150 determinations of peak oxygen uptake on each ergometer

ns not significant (p > 0.05), – not entered

^aAge centred on mean age 13.5 years

^bEstimated fat free mass (Slaughter et al. 1988)