Table 1.
Baseline characteristics by intervention group
| Control (n = 494) | MICT (n = 235) | HIIT (n = 216) | |
|---|---|---|---|
| Mean (SD) age (years) | 72.2 (2.02) | 72.3 (2.05) | 72.4 (2.08) |
| Women | 239 (48.4) | 114 (48.5) | 97 (44.9) |
| Cohabitation (yes) | 378 (76.5) | 169 (71.9) | 171 (79.2) |
| Higher education (college/university) | 271 (54.9) | 138 (58.7) | 123 (56.9) |
| Minimum of 30 min PA daily | 355 (71.9) | 177 (75.3) | 169 (78.2) |
| Mean (SD) sedentary time (hours) | 5.57 (2.18) | 5.96 (2.21) | 5.50 (2.05) |
| Mean (SD) (mL/kg/min) | 29.8 (6.42) | 29.8 (6.45) | 30.8 (6.33) |
| Mean (SD) waist circumference | 93.9 (10.5) | 93.5 (10.9) | 93.3 (10.9) |
| Daily smoker | 16 (3.2) | 9 (3.8) | 5 (2.3) |
| Mean (SD) units of alcohol (past 2 weeks) | 7.80 (7.50) | 7.52 (7.86) | 7.00 (7.51) |
| Mean (SD) depression score (HADS) | 2.38 (2.11) | 2.77 (2.36) | 2.50 (2.05) |
| Mean (SD) anxiety score (HADS) | 2.87 (2.43) | 3.39 (2.97) | 3.12 (2.40) |
| History of CVD | 73 (14.8) | 48 (20.4) | 33 (15.3) |
| Hypertension | 261 (52.8) | 126 (53.6) | 101 (46.8) |
| Diabetes mellitus | 25 (5.06) | 10 (4.26) | 8 (3.70) |
| Limiting long-term illness | 65 (13.2) | 49 (20.9) | 24 (11.1) |
| Self-reported memory problems | 258 (52.2) | 111 (47.2) | 117 (54.2) |
| Headaches past year (yes) | 52 (10.5) | 34 (14.5) | 18 (8.3) |
| Family history of dementia | 65 (13.2) | 37 (15.7) | 39 (18.1) |
CVD cardiovascular disease, HADS Hospital Anxiety and Depression Scale, HIIT high-intensity interval training, MICT moderate-intensity continuous training, PA physical activity, VO2peak peak oxygen uptake
Values are presented as n (%) unless stated otherwise