APPENDIX
	[model 1, MRT]
	[model 2]
	[model 3]
	[model 4]
	[model 5]
Where: MRT, mean response time; t, time in seconds; , DVO2(t)increase in VO2 at time t above the prior control level; DVO2(ss), steady-state increment in VO2; t , time constant which is time to achieve 63% of the DVO2(ss); A1, A2 and A3, t1, t2 and t3 and δ1 ,δ2 δ3, amplitudes, time constants and time delays of each exponential respectively.