Measured variables during and after MBWT (mean±SD)
| Stage | Groups | HR (bpm) |
VO2 (L/min) |
VO2 (mL/kg/min) |
VCO2 (L/min) |
VCO2
(mL/kg/min) |
VE (L/min) | RER | Gross (kcal/min) | Percentage AT | BF (breath/min) | RPE |
| 1 | Controls | 70.2±10.4 | 0.78±0.16 | 9.7±1.6 | 0.56±0.13 | 7.0±2.0 | 22.0±5.9 | 0.71±0.05 | 4.7±0.06 | 31.3±5.8 | 16.4±4.3 | 6.9±0.5 |
| Post-MIs | 72.8±8.9 | 0.91±0.17* | 10.4±1.6 | 0.64±0.19 | 8.0±3.0 | 24.5±5.5 | 0.73±0.04 | 4.7±0.06 | 40.8±6.1** | 21.8±1.0** | 7.4±1.3* | |
| 2 | Controls | 77.0±10.4 | 0.99±0.14 | 12.3±1.3 | 0.72±0.12 | 9.0±2.0 | 25.9±5.2 | 0.73±0.05 | 4.7±0.06 | 39.5±4.1 | 16.2±4.2 | 8.8±1.1 |
| Post-MIs | 80.7±10.9 | 1.11±0.13** | 12.8±1.9 | 0.83±0.21 | 10.0±3.0** | 30.7±5.2** | 0.78±0.06** | 4.8±0.08** | 50.2±7.2** | 21.2±5.10** | 8.9±1.4 | |
| 3 | Controls | 87.1±16.0 | 1.26±0.19 | 15.6±1.8 | 0.98±0.16 | 13.0±2.0 | 35.1±8.5 | 0.78±0.06 | 4.8±0.01 | 50.2±5.8 | 17.4±4.6 | 10.8±1.2 |
| Post-MIs | 89.8±11.3 | 1.43±0.19* | 16.5±2.3 | 1.14±0.29* | 14.0±4.0** | 40.6±8.2* | 0.84±0.05** | 4.9±0.06** | 64.3±8.8** | 24.7±7.0** | 11.1±2.3 | |
| 4 | Controls | 107.0±13.6 | 1.85±0.28 | 23.0±2.9 | 1.50±0.22 | 19.0±3.0 | 51.1±10.8 | 0.82±0.07 | 4.8±0.09 | 74.0±9.4 | 19.6±4.4 | 12.8±1.6 |
| Post-MIs | 110.4±12.3 | 1.95±0.28 | 22.5±2.4 | 1.66±0.49 | 20.0±6.0 | 58.7±11.6* | 0.89±0.06** | 4.9±0.07** | 87.8±9.3** | 28.4±4.0 | 13.2±1.3 | |
| 5 | Controls | 136.7±12.9 | 2.64±0.43 | 32.6±3.0 | 2.47±0.35 | 31.0±5.0 | 74.2±11.3 | 0.94±0.09 | 5.0±0.11 | 104.9±9.7 | 25.3±4.2 | 15.3±1.4 |
| Post-MIs n=18 | 132.1±13.4 | 2.52±0.41 | 29.3±4.3** | 2.46±0.70 | 30.0±9.0 | 73.5±17.6 | 1.02±0.09** | 5.1±0.11** | 114.4±16.8* | 33.2±10.7** | 15.5±1.5 |
*Statistically significantly different from controls (p<0.05).
**Statistically significantly different from controls (p<0.01).
AT, anaerobic threshold; BF, breathing frequency; HR, heart rate; MBWT, modified Bruce treadmill walking test; MI, myocardial infarction; RER, respiratory exchange ratio; RPE; rating of perceived exertion.