Table 1: Cardiorespiratory data at rest and maximal exercise in young and older groups (n = 36).

Variable Young group (n =16) Older group (n = 20)
rest Ex40% Ex75% Ex100% rest Ex40% Ex75% Ex100%
V . O 2 (mL.kg-1.min-1) 4 ± 1 24 ± 6+ Ϯ 38 ± 4 Ϯ 53 ± 6 Ϯ 4 ± 0 20 ± 4 Ϯ 29 ± 6* Ϯ 36 ± 6* Ϯ
V . CO 2 (mL.kg-1.min-1) 5 ± 1 32 ± 4 Ϯ 48 ± 6 Ϯ 48 ± 6 Ϯ 5 ± 0 27 ± 5 Ϯ 35 ± 6* Ϯ 42 ± 6*
V . E (mL.kg-1.min-1) 151 ± 26 728 ± 86 Ϯ 1408 ± 276 Ϯ 1705 ± 370 Ϯ 138 ± 16 691 ± 45 Ϯ 1001 ± 85* Ϯ 1234 ± 190*
HR (bpm) 73 ± 7 128 ± 6 Ϯ 166 ± 7 Ϯ 186 ± 9 Ϯ 80 ± 7 80 ± 7 151 ± 5* Ϯ 156 ± 8* Ϯ
Work rate (watts) 0 88 ± 10 Ϯ 180 ± 12 Ϯ 244 ± 31 Ϯ 0 59 ± 7* Ϯ 103 ± 10* Ϯ 146 ± 18* Ϯ

*: Significantly different than young group (P < 0.05); Ϯ: Significantly different than previous work rate (P < 0.05)