Table 3

Cardiopulmonary response during exercise on a treadmill for men; all and divided by 5-year age cohorts

	Age, years
	18–22	23–27	28–32	33–37	38–42	43–68	All
VO₂peak, L min⁻¹	3.15±0.99	2.72±0.86	2.76±1.07	3.15±1.03	3.17±0.71	2.76±1.06	2.95±0.99
VO₂peak, mL kg⁻¹ min⁻¹	46.4±11.0	39.3±10.9	38.4±13.1	40.0±10.7	41.8±7.9	34.0±10.6	40.5±11.6
VO₂peak, % predicted	89±21	79±22	81±28	87±23	96±18	87±26	86±23
VT, L min⁻¹	2.03±0.59	1.97±0.42	1.96±0.56	2.13±0.45	2.08±0.40	1.97±0.50	2.02±0.50
VT, % of VO₂peak	58±9	68±15	69±19	62±15	66±14	72±14	65±14
HR_max, beats min⁻¹	186±12	173±16	177±14	178±18	174±7	166±13	177±15
Oxygen pulse, mL beat⁻¹	16.8±4.8	15.4±4.2	15.4±5.5	17.5±4.9	18.2±3.8	16.5±6.1	16.5±5.0
VE, L min⁻¹	112±36	92±33	93±39	108±42	117±31	95±34	102±37
Breathing reserve, %	24±14	26±12	25±19	23±15	16±9	26±12	24±14
SpO₂, %	93±4	91±4	88±7	88±8	89±5	91±5	90±6
RER	1.23±0.11	1.21±0.13	1.18±0.15	1.19±0.09	1.23±0.09	1.18±0.09	1.20±0.11
RPE (BORG 6–20)	18 (15–19)	18 (13–19)	17 (15–20)	18 (16–19)	18.5 (17–20)	18 (17–19)	18 (13–20)
VE/VCO₂ slope	25.1±3.6	24.5±3.9	25.4±2.6	25.4±2.9	26.6±1.8	26.6±3.8	25.5±3.3

Data are presented as mean±SD, median (range) or N.
HR_max, maximal heart rate; RER, respiratory exchange ratio (VCO₂VO₂^-1); RPE, ratings of perceived exertion; SpO₂, peripheral capillary oxygen saturation; VE, minute ventilation; VE/VCO₂, ventilatory equivalent for carbon dioxide; VO₂peak, peak oxygen uptake; VT, ventilatory threshold.