Outcome measures and time points at which they were taken
| Instrument | T0 | T1 | T2 | T3 |
| Baseline demographic and clinical characteristics | ||||
| Age, sex, educational level, smoking status | X | |||
| Spirometry | X | |||
| Manipulation check | X | X | ||
| Working memory span | X | X | ||
| Number of completed sessions | X | X | ||
| Primary outcome measures | ||||
| Cambridge Neuropsychological Test Automated Battery# | X | X | X | X |
| Addenbrooke's Cognitive Examination-Revised | X | |||
| Secondary outcome measures | ||||
| Physical capacity and activity | ||||
| 6-min walk test | X | X | X | |
| Short Physical Performance Battery | X | X | X | |
| Accelerometry | X | X | X | |
| Dietary intake | ||||
| Alternative Healthy Eating Index-2010 | X | X | X | |
| Cognitive stress susceptibility and perception | ||||
| Cortisol Awakening Response | X | X | ||
| Perceived Stress Scale | X | X | X | |
| Socially Evaluated Cold Pressor Test | X | X | X | |
| Healthy lifestyle goal recall¶ | X | X | ||
| Exploratory outcome measures | ||||
| Healthy lifestyle motivation | ||||
| Behavioural Regulation of Exercise Questionnaire-2 | X | X | ||
| Regulation of Eating Behaviours Scale | X | X | ||
| Psychological wellbeing | ||||
| Beck Depression Inventory-II | X | X | X | |
| Generalised Anxiety Disorder-7 | X | X | X |
T0: baseline minus 1 week; T1: baseline; T2: after the first phase (baseline+12 weeks); T3: after the second phase (baseline+24 weeks). #: administration at T0 took place to compensate for learning effects. ¶: healthy lifestyle goals were set at T1.