Domains and assessments at baseline
| Domain and assessment | Time to administer (min) |
| Sociodemographic profile | Total: 6 |
| Age | |
| Sex | |
| Marital status | |
| Education | |
| Social class (NS-SEC)64 | |
| Deprivation (Multiple Index of Deprivation)65 | |
| General health | Total: 54 |
| SF-12 Health Survey34 | 4 |
| Self-reported diseases diagnosed by a doctor | 2 |
| List of medication (prescribed and over-the-counter) | 2 |
| Mini Mental State Examination | 10 |
| Geriatric Depression Scale (15-item version)66 | 7 |
| Barthel Index (activities of daily living)35 | 3 |
| Blood pressure (systolic and diastolic)* | 5 |
| Intake24: 24 hours dietary recall67* (https://intake24.co.uk/) | 20 |
| Appetite (a 4-item Simplified Nutritional Appetite Questionnaire)68* | 1 |
| Lifestyle | Total: 5 |
| Self-reported physical activity69 | 3 |
| Smoking status | 1 |
| Alcohol intake | 1 |
| Anthropometry | Total: 14 |
| Demi-span | 2 |
| Waist and hip circumference | 3 |
| Calf circumference | 2 |
| Muscle mass (body composition by BIA)33* | 7 |
| Physical functioning | Total: 24 |
| Short Physical Performance Battery63 | 10 |
| Balance (a side-by-side tandem; semi-tandem; tandem) | 3 |
| 4 m gait speed | 3 |
| 5-chair stands | 4 |
| Maximum grip strength (measured three times in each arm) | 4 |
NS-SEC, The National Statistics Socio-economic classification (Office for National Statistics, UK).
*Assessments done at the intervention site (gym) before and after each RE session (blood pressure), and before the first RE session (diet, appetite, body composition).
BIA, Bioelectric Impedance Analysis; RE, resistance exercise; SF-12, 12-item Short Form Health Survey.