. Author manuscript; available in PMC: 2013 Jun 1.

Published in final edited form as: Med Sci Sports Exerc. 2012 Jun;44(6):1043–1048. doi: 10.1249/MSS.0b013e3182444c4b

Table 4.

Constant Load Exercise in Women and Men at 60 and 90W, respectively

	$\dot{V} O_{2}$ (L/min)	$\dot{V} O_{2}$ (% pred peak)	$\dot{V} {CO}_{2}$ (L/min)	${\dot{V}}_{E}$ (L/min)	V_T (% FVC)	F_b (bpm)	${\dot{V}}_{E} ∕ \dot{V} {CO}_{2}$ (%)	P_ETCO₂ (torr)	${\dot{V}}_{E} ∕ PMVV$ (%)	EELV (% TLC)	HR (% pred peak)
Women @ rest	0.23 ± 0.03	10 ± 1	0.17 ± 0.02	8 ± 1	20 ± 6	13 ± 3	49 ± 8	38 ± 3	7 ± 1	56 ± 8	40 ± 7
Men @ rest	0.30 ± 0.06	9 ± 1	0.26 ± 0.07	11 ± 2	17 ± 9	12 ± 3	44 ± 6	40 ± 4	6 ± 1	53 ± 9	38 ± 6
P value rest	0.0029	0.0183	0.0046	0.0049	ns	ns	ns	ns	ns	ns	ns
Women @ 60W	1.03 ± 0.08	48 ± 7	1.06 ± 0.10	36 ± 7	42 ± 9	24 ± 8	34 ± 4	40 ± 4	32 ± 12	50 ± 7	73 ± 15
Men @ 90W	1.56 ± 0.07	46 ± 6	1.52 ± 0.08	41 ± 6	43 ± 8	18 ± 7	27 ± 3	49 ± 4	24 ± 5	48 ± 6	64 ± 10
P value exercise	<0.0001	ns	<0.0001	ns	ns	ns	0.0011	0.0002	0.0430	ns	ns

Values are mean ± SD. ${\dot{V}}_{O_{2}}$ , oxygen uptake (expressed in L/min and as percent of predicted peak ${\dot{V}}_{O_{2}}$ based on age and gender); ${\dot{V}}_{{CO}_{2}}$ , carbon dioxide production; ${\dot{V}}_{E}$ , minute ventilation; VT, tidal volume (expressed as percent of FVC); Fb, breathing frequency (expressed in breaths per minute, bpm); ${\dot{V}}_{E} ∕ {\dot{V}}_{C O_{2}}$ , ventilatory equivalent for CO2; P_ETCO₂, end-tidal CO2; ${\dot{V}}_{E} ∕ PMVV$ , ratio of minute ventilation to maximal voluntary ventilation predicted from FEV1 (PMVV=37.5*FEV1); EELV, end-expiratory lung volume (expressed as percent of TLC); HR, heart rate (expressed as percent of predicted peak heart rate based on age and gender); and ns, non-significant.