Exercise data (mean (SD))
| Exercise 1 | Exercise 2 | t test | Linear regression | |
|---|---|---|---|---|
| Group A (30 mins) | ||||
| Total exercise time (s) | 388 (150) | 434 (161) | p < 0.001 | y = −0.91x−6.2,r = 0.95, p < 0.0001 |
| Time to angina (s) | 252 (168) | 294 (182) | p < 0.05 | y = 0.86x+3.5,r = 0.92, p < 0.0001 |
| Time to 1 mm ST (s) | 290 (167) | 360 (164) | p < 0.05 | y = 0.89x−32,r = 0.77, p = 0.002 |
| Maximum ST (mm) | 2 (1) | 1.9 (1.3) | NS | y = 0.71x+0.64, r= 0.86, p = 0.0001 |
| Workload (METS) | 7.6 (2) | 8.6 (2) | p < 0.0001 | y = 0.89x−0.068, r = 0.89, p = 0.0001 |
| Rate–pressure product (× 100) | 200.6 (58.1) | 216.4 (64.1) | p < 0.05 | y = 0.82x+235, r = 0.82, p = 0.0001 |
| Group B (60 mins) | ||||
| Total exercise time (s) | 342 (164) | 347 (165) | NS | y = 0.89x+41.6, r = 0.95, p = 0.0001 |
| Time to angina (s) | 206 (110) | 224 (118) | NS | y = 0.99x+19.9, r = 0.92, p = 0.0001 |
| Time to 1 mm ST (s) | 222 (133) | 258 (152) | NS | y = 1.1x+15.7,r = 0.96, p = 0.0001 |
| Maximum ST (mm) | 2.1 (0.9) | 1.9 (1) | NS | y = 0.86x+0.119,r = 0.79, p = 0.0007 |
| Workload (METS) | 6.6 (2.9) | 6.7 (2.6) | NS | y = 0.84x+1.1,r = 0.96, p = 0.0001 |
| Rate–pressure product (× 100) | 217 (3.63) | 218 (5.07) | NS | y = 1.1x−2932, r = 0.81, p = 0.0004 |
| Group C (240 mins) | ||||
| Total exercise time (s) | 329 (144) | 332 (126) | NS | y = 1.1x−38.3, r = 0.93, p = 0.0001 |
| Time to angina (s) | 231 (105) | 244 (148) | NS | y = 1.2x36.5, r = 0.85, p < 0.0001 |
| Time to 1 mm ST (s) | 247 (132) | 259 (95) | NS | y = 1.08x32.3,r = 0.78, p = 0.01 |
| Maximum ST (mm) | 1.8 (0.8) | 1.43 (0.44) | NS | y = 1.05x+0.298,r = 0.58, p = NS |
| Workload (METS) | 6.5 (2.4) | 6.5 (2.2) | NS | y = 1.1x−0.61,r = 0.94, p = 0.0001 |
| Rate–pressure product (× 100) | 241 (40) | 247 (58) | NS | y= 0.56x−10372,r = 0.80, p = 0.003 |
METS, metabolic equivalents.