Table 1. Participant Characteristics at Baseline.
| Characteristic | No. (%) | P value | |
|---|---|---|---|
| HIIT (n = 46) | MICT (n = 47) | ||
| Male | 39 (85) | 39 (83) | >.99 |
| Age, mean (SD), y | 65 (7) | 65 (8) | .98 |
| Body mass index, mean (SD)a | 28.2 (4.2) | 28.5 (4.2) | .67 |
| Blood pressure, mean (SD), mm Hg | |||
| Systolic | 128 (15) | 130 (14) | .62 |
| Diastolic | 75 (10) | 74 (9) | .72 |
| Resting heart rate, mean (SD), beats/min | 57 (10) | 57 (8) | .92 |
| Reason for hospital admission | |||
| Acute coronary syndrome | 13 (28) | 16 (34) | .66 |
| ST-elevation myocardial infarction | 1 (2) | 9 (19) | .02 |
| Non–ST-elevation myocardial infarction | 8 (17) | 6 (13) | .57 |
| Unstable angina pectoris | 4 (9) | 1 (2) | .20 |
| Diagnostic angiography only | 33 (72) | 31 (66) | .66 |
| Coronary intervention | |||
| Coronary artery bypass grafting | 15 (33) | 11 (23) | .36 |
| Percutaneous coronary intervention | 23 (50) | 23 (49) | >.99 |
| Medical therapy only | 8 (17) | 13 (28) | .32 |
| Comorbidities | |||
| Diabetes | 2 (4) | 7 (15) | .16 |
| Current smoking | 1 (2) | 2 (4) | >.99 |
| Left ventricular dysfunctionb | 3 (7) | 5 (11) | .72 |
| Chronic atrial fibrillation | 1 (2) | 1 (2) | >.99 |
| Medications | |||
| β-Blocker | 18 (39) | 20 (43) | .83 |
| Angiotensin-converting enzyme inhibitor | 9 (20) | 17 (36) | .11 |
| Angiotensin II receptor blocker | 16 (35) | 16 (34) | >.99 |
| Calcium channel blocker | 3 (7) | 6 (13) | .49 |
| Diuretic | 7 (15) | 7 (15) | >.99 |
| Antiarrhythmic | 2 (4) | 2 (4) | >.99 |
| Anticoagulant | 4 (9) | 1 (2) | .20 |
| Statin | 45 (98) | 44 (94) | .62 |
| Aspirin | 44 (96) | 43 (92) | .68 |
| Other antiplatelet | 25 (54) | 27 (57) | .84 |
Abbreviations: HIIT, high-intensity interval training; MICT, moderate-intensity continuous training.
a
Calculated as weight in kilograms divided by height in meters squared.
b
Left ventricular dysfunction was defined either quantitatively (ejection fraction less than 50%) or qualitatively from the patient’s most recent echocardiography or left heart ventriculography during angiography procedure.