Table 2.

Cardiovascular response to exercise in all male and female subjects

Rest30%50%70%VTVT+2590%
All men (n = 16) (V̇o2peak = 3.98 ± 0.76 l/min, 53.2 ± 9.5 ml·kg−1·min−1)
HR, bpm74 ± 8100 ± 9126 ± 9150 ± 12156 ± 15164 ± 14177 ± 14
SV, ml98 ± 22106 ± 22110 ± 22112 ± 22113 ± 22113 ± 22114 ± 23
Q̇, l/min7.1 ± 1.310.6 ± 2.313.8 ± 2.716.9 ± 3.417.4 ± 3.418.5 ± 3.520.1 ± 4.1
DlCO/Q̇4.8 ± 0.33.8 ± 0.23.4 ± 0.22.8 ± 0.1*2.8 ± 0.12.8 ± 0.22.6 ± 0.2
Embedded Image, %98.9 ± 1.198.7 ± 1.598.5 ± 1.597.4 ± 2.097.4 ± 2.097.2 ± 2.197.1 ± 1.9
All women (n = 16) (V̇o2peak = 3.00 ± 0.40 l/min, 44.2 ± 4.1 ml·kg−1·min−1)
HR, bpm75 ± 1199 ± 13124 ± 12149 ± 12151 ± 14162 ± 15174 ± 12
SV, ml99 ± 14116 ± 18115 ± 16114 ± 16115 ± 16114 ± 17114 ± 17
Q̇, l/min7.2 ± 1.011.4 ± 1.614.2 ± 1.717.0 ± 2.117.2 ± 2.218.4 ± 2.519.7 ± 2.7
DlCO/Q̇3.6 ± 0.22.8 ± 0.12.6 ± 0.12.3 ± 0.12.3 ± 0.12.3 ± 0.12.3 ± 0.1
Embedded Image, %98.9 ± 1.198.7 ± 1.598.5 ± 1.597.4 ± 2.097.4 ± 2.097.2 ± 2.197.1 ± 1.9
Highly fit men (n = 7) (V̇o2peak = 4.59 ± 0.56 l/min, 62.1 ± 3.5 ml·kg−1·min−1)
HR, bpm70 ± 7104 ± 5130 ± 7156 ± 10162 ± 15168 ± 16181 ± 14
SV, ml100 ± 29106 ± 27111 ± 26115 ± 25115 ± 25116 ± 25117 ± 25
Q̇, l/min7.0 ± 1.610.9 ± 2.514.4 ± 3.017.8 ± 3.818.3 ± 3.519.3 ± 3.621.2 ± 4.7
DlCO/Q̇5.6 ± 0.43.8 ± 0.23.4 ± 0.22.8 ± 0.12.7 ± 0.12.8 ± 0.12.5 ± 0.1
Embedded Image, %98.6 ± 1.598.9 ± 1.197.7 ± 1.695.7 ± 1.795.9 ± 1.995.3 ± 1.894.9 ± 1.6
Highly fit women (n = 7) (V̇o2peak = 3.08 ± 0.30 l/min,·52.3 ± 7.0 ml·kg−1·min−1)
HR, bpm74 ± 1095 ± 13119 ± 13144 ± 13147 ± 12157 ± 13168 ± 13
SV, ml92 ± 14112 ± 23111 ± 22111 ± 23111 ± 23111 ± 23110 ± 23
Q̇, l/min6.7 ± 1.010.6 ± 2.513.2 ± 2.615.8 ± 3.016.2 ± 2.917.3 ± 3.118.4 ± 3.5
DlCO/Q̇3.8 ± 0.33.1 ± 0.22.8 ± 0.12.6 ± 0.12.6 ± 0.12.5 ± 0.12.5 ± 0.1
Embedded Image, %98.6 ± 1.098.4 ± 1.198.4 ± 1.396.5 ± 1.496.3 ± 1.296.2 ± 1.296.2 ± 1.2
Fitness-matched men (n = 7) (V̇o2peak = 3.30 ± 0.36 l/min, 45.6 ± 4.7 ml·kg−1·min−1)
HR, bpm75 ± 894 ± 11122 ± 10144 ± 13150 ± 14161 ± 13172 ± 13
SV, ml94 ± 17103 ± 17105 ± 16106 ± 17106 ± 17107 ± 18108 ± 18
Q̇, l/min6.9 ± 0.89.6 ± 1.812.6 ± 2.115.3 ± 2.516.0 ± 3.217.3 ± 3.318.6 ± 3.4
DlCO/Q̇4.6 ± 0.43.9 ± 0.33.5 ± 0.22.9 ± 0.12.9 ± 0.22.8 ± 0.22.7 ± 0.2
Embedded Image, %97.5 ± 0.898.6 ± 1.197.9 ± 1.497.1 ± 0.796.7 ± 1.196.3 ± 1.496.7 ± 1.9
Fitness-matched women (n = 7) (V̇o2peak = 3.29 ± 0.30 l/min, 46.6 ± 4.8 ml·kg−1·min−1)
HR, bpm74 ± 895 ± 14119 ± 14144 ± 14148 ± 17158 ± 17169 ± 15
SV, ml97 ± 16117 ± 21116 ± 19115 ± 18115 ± 18115 ± 18114 ± 18
Q̇, l/min7.2 ± 1.110.9 ± 2.013.7 ± 1.916.4 ± 2.016.8 ± 1.717.9 ± 1.819.1 ± 2.3
DlCO/Q̇3.9 ± 0.33.1 ± 0.22.9 ± 0.22.6 ± 0.22.5 ± 0.12.4 ± 0.22.5 ± 0.2
Embedded Image, %98.8 ± 1.298.5 ± 1.698.0 ± 1.396.4 ± 2.396.4 ± 2.396.2 ± 1.995.8 ± 1.6
  • Values are expressed as means ± SD. Columns indicate exercise intensity as % of peak oxygen consumption (V̇o2peak). VT, ventilatory threshold; VT+25, ventilatory threshold + 25 W; HR, heart rate; SV, stroke volume; Q̇, cardiac output. Note that preplanned comparisons were performed only at 70% and 90% of V̇o2peak.

  • * Significantly different vs. female group (P < 0.025).