Table 1.
Characteristics of the participants in the NIH-AARP Diet and Health study who returned the follow-up questionnaire, by levels of weight training (n = 216 339)
| Weight training/week |
|||||||
|---|---|---|---|---|---|---|---|
| Characteristic | None | 5–15 min | 30 min | 1 h | 1.5 h | 2–3 h | 4+ h |
| n (%) | 162 246 (75.0) | 9800 (4.5) | 11 223 (5.2) | 11 687 (5.4) | 8188 (3.8) | 8792 (4.1) | 4403 (2.0) |
| Age (years), 2004–05, mean (SD) | 70.1 (5.4) | 69.4 (5.5) | 69.5 (5.4) | 69.4 (5.4) | 69.1 (5.2) | 68.9 (5.3) | 68.8 (5.2) |
| Sex (%) | |||||||
| Men | 57.0 | 62.2 | 59.9 | 61.4 | 62.3 | 64.3 | 69.7 |
| Women | 43.0 | 37.8 | 40.1 | 38.6 | 37.7 | 35.7 | 30.3 |
| Race (%) | |||||||
| White | 94.0 | 93.5 | 94.3 | 94.7 | 95.2 | 94.9 | 92.6 |
| Black | 3.1 | 3.1 | 2.7 | 2.3 | 1.9 | 1.9 | 3.7 |
| Hispanic | 1.5 | 1.4 | 1.5 | 1.5 | 1.5 | 1.7 | 2.4 |
| Other | 1.4 | 2.0 | 1.6 | 1.4 | 1.3 | 1.5 | 1.3 |
| Smoking status, 2004–05 (%) | |||||||
| Never smoker | 40.3 | 41.9 | 41.2 | 39.9 | 38.5 | 38.6 | 38.1 |
| Former smoker, quit 10+ years ago | 42.5 | 46.3 | 47.0 | 48.1 | 49.3 | 49.5 | 49.1 |
| Former smoker, quit 5–9 year ago | 3.4 | 2.9 | 2.7 | 3.0 | 3.2 | 2.8 | 2.5 |
| Former smoker, quit <5 years ago | 2.8 | 2.1 | 2.0 | 2.0 | 2.2 | 1.9 | 2.3 |
| Former smoker, time since quitting unknown | 4.3 | 3.7 | 4.1 | 4.1 | 4.0 | 4.3 | 4.8 |
| Current smoker | 6.7 | 3.1 | 3.1 | 2.8 | 2.6 | 2.9 | 3.2 |
| Education level, 1995–96 (%) | |||||||
| <12 years | 4.0 | 1.8 | 1.6 | 1.5 | 1.7 | 1.4 | 2.7 |
| 12 years or completed high school | 19.5 | 10.9 | 11.2 | 10.0 | 9.7 | 9.6 | 12.8 |
| Post high-school training | 10.4 | 7.7 | 7.4 | 7.9 | 6.6 | 7.1 | 7.5 |
| Some college | 24.2 | 20.7 | 22.0 | 21.8 | 21.8 | 21.1 | 23.4 |
| College graduate | 41.9 | 58.9 | 57.8 | 58.8 | 60.2 | 60.8 | 53.6 |
| Self-reported health, 1995–96 (%) | |||||||
| Excellent | 16.9 | 22.0 | 24.6 | 27.1 | 30.1 | 32.5 | 33.7 |
| Very good | 37.9 | 40.0 | 41.7 | 41.3 | 41.6 | 41.1 | 39.4 |
| Good | 35.8 | 31.0 | 28.1 | 27.0 | 24.3 | 22.6 | 22.4 |
| Fair | 8.6 | 6.4 | 5.3 | 4.2 | 3.6 | 3.6 | 4.2 |
| Poor | 0.8 | 0.6 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 |
| Body mass index (kg/m2), 1995–96 (%) | |||||||
| <18.5 | 0.9 | 1.1 | 1.0 | 1.0 | 1.2 | 1.1 | 1.0 |
| 18.5–<25 | 34.0 | 42.0 | 42.9 | 44.8 | 45.4 | 45.8 | 43.0 |
| 25–<30 | 43.0 | 40.9 | 41.8 | 40.6 | 40.2 | 40.3 | 42.8 |
| 30–<35 | 16.0 | 12.1 | 11.1 | 10.8 | 10.5 | 10.0 | 10.2 |
| 35+ | 6.1 | 4.0 | 3.3 | 2.8 | 2.6 | 2.8 | 2.9 |
| Body mass index (kg/m2), 1995–96, mean (SD) | 27.1 (4.9) | 26.2 (4.6) | 26.0 (4.6) | 25.9 (4.2) | 25.8 (4.1) | 25.8 (4.1) | 25.9 (4.8) |
| Alcohol intake (g/day), 1995–96, mean (SD) | 12.8 (34.7) | 12.6 (29.6) | 12.1 (28.0) | 12.3 (27.8) | 12.9 (27.0) | 12.9 (28.8) | 14.6 (35.3) |
| Healthy Eating Index score, 1995–96, mean (SD) | 67.5 (9.5) | 69.7 (8.9) | 70.4 (8.8) | 70.8 (8.6) | 71.3 (8.5) | 71.1 (8.6) | 70.4 (8.8) |
| Aerobic leisure-time exercise (MET-h/week), 2004–05, mean (SD) | 20.2 (26.6) | 25.0 (25.0) | 31.8 (27.2) | 38.2 (31.0) | 40.6 (31.7) | 49.7 (38.3) | 97.0 (84.5) |
| Aerobic leisure-time exercise (MET-h/week), 2004–05 (%) | |||||||
| 0 | 13.6 | 1.7 | 1.5 | 1.3 | 1.3 | 1.4 | 1.9 |
| 0.1–<10.75 | 31.9 | 31.0 | 16.6 | 9.9 | 6.5 | 5.1 | 3.9 |
| 10.75–<29 | 30.3 | 36.3 | 39.2 | 36.5 | 35.0 | 24.9 | 11.8 |
| 29+ | 24.2 | 30.9 | 42.6 | 52.4 | 57.2 | 68.6 | 82.4 |
MET, metabolic equivalent of task; NIH-AARP, National Institutes of Health-American Association of Retired Persons; SD, standard deviation.