Table 3.
Cardiorespiratory measures during submaximal constant load exercise
| Children without obesity | Children with obesity | |||||
|---|---|---|---|---|---|---|
| Girls (n=13) | Boys (n=14) | All (n=27) | Girls (n=17) | Boys (n=29) | All (n=46) | |
| Work load (W) | 40 ± 7 | 48 ± 12 | 44 ± 10 | 41 ± 8 | 42 ± 6 | 42 ± 7 |
| HR (bpm) | 148 ± 16* | 132 ± 13 | 140 ± 17 | 150± 14* | 141 ± 11 | 144 ± 13 |
| HR (% Predicted) | 69 ± 8* | 62 ± 6 | 65 ± 8 | 69 ± 7* | 66 ± 5 | 67 ± 6 |
| HR (% Maximum) | 78 ± 8* | 70 ± 6 | 73 ± 8 | 78 ± 6* | 75 ± 4 | 76 ± 5 |
| V̇E (L/min) | 29.99 ± 3.27 | 30.61 ± 5.85 | 30.31 ± 4.71 | 33.61 ± 4.96# | 34.03 ± 5.23# | 33.87 ± 5.08# |
| V̇Ecorr (L/min) | 21.79 ± 3.10 | 22.88 ± 5.71 | 22.35 ± 4.59 | 24.40 ± 4.61# | 25.54 ± 4.69# | 25.11 ± 4.65# |
| VT (L) | 0.86 ± 0.20 | 0.94 ± 0.29 | 0.90 ± 0.25 | 0.85 ± 0.18 | 0.93 ± 0.26 | 0.90 ± 0.23 |
| Fb (bpm) | 36.6 ± 9.3 | 34.1 ± 8.3 | 35.3 ± 8.7 | 40.6 ± 9.3 | 38.3 ± 8.7 | 39.1 ± 8.9 |
| V̇O2 (L/min) | 0.80 ± 0.10* | 0.93 ± 0.19 | 0.86 ± 0.16 | 0.92 ± 0.18*# | 1.00 ± 0.17# | 0.97 ± 0.15# |
| V̇CO2 (L/min) | 0.78 ± 0.11 | 0.86 ± 0.22 | 0.82 ± 0.17 | 0.86 ± 0.17# | 0.94 ± 0.13# | 0.91 ± 0.15# |
| V̇E/V̇O2 ratio | 37.9 ± 5.7* | 33.1 ± 4.4 | 35.4 ± 5.5 | 36.6 ± 4.6* | 34.0 ± 3.8 | 35.0 ± 4.2 |
| V̇Ecorr/V̇O2 ratio | 27.3 ± 3.2* | 24.5 ± 2.9 | 25.8 ± 3.3 | 26.3 ± 2.4* | 25.4 ± 2.6 | 25.7 ± 2.5 |
| V̇E/V̇CO2 ratio | 38.5 ± 5.5* | 36.2 ± 5.0 | 3 7.3 ± 5.3 | 39.2 ± 5.2* | 36.3 ± 4.0 | 37.4 ± 4.7 |
| V̇Ecorr/V̇CO2 ratio | 27.7 ± 2.4 | 26.7 ± 2.7 | 27.2 ± 2.6 | 28.1 ± 2.1 | 27.1 ± 3.0 | 27.5 ± 2.7 |
| PETCO2 (Torr) | 40 ± 4 | 41 ± 4 | 40 ± 4 | 39 ± 4 | 40 ± 4 | 40 ± 4 |
| RPE (Borg 6–20 scale) | 11 ± 2 | 11 ± 3 | 11 ± 2 | 11 ± 3 | 12 ± 3 | 11 ± 3 |
Data are mean ± SD. HR: heart rate; V̇E: minute ventilation; V̇Ecorr: minute ventilation corrected for the volume of dead space imposed by the breathing apparatus; VT: tidal volume; Fb: breathing frequency; V̇O2: oxygen uptake; V̇CO2: carbon dioxide production; PETCO2: partial pressure of endtidal CO2; RPE: rating of perceived exertion.
#
Significantly different compared with children without obesity, p < 0.05;
*
Significantly different between sexes, p < 0.05.