Table 3.
Association Between Adiposity and Change in Walking Endurance
| Weight | BMI | BMI Classification | Percent Fat Mass | |
|---|---|---|---|---|
| β (p) | β (p) | β (p) | β (p) | |
| Age 60–69 y, (n = 210) | ||||
| Age, y | 1.5 (.007) | 1.5 (.007) | 1.4 (.01) | 1.3 (.02) |
| Female | 0.5 (.91) | 2.2 (.49) | 1.1 (.74) | −6.5 (.18) |
| Black | 1.6 (.61) | 1.7 (.58) | 3.0 (.35) | 3.3 (.29) |
| Weight, kg | 0.4 (.003) | — | — | — |
| BMI, kg/m2 | — | 1.0 (.004) | — | — |
| BMI classifications | ||||
| Normal, 18.5–24.5 | — | — | Reference | — |
| Overweight, 25–29.5 | — | — | 2.7 (.45) | — |
| Obese, ≥30 | — | — | 7.9 (.07) | — |
| Fat mass, % | — | — | — | 0.5 (.04) |
| Age 70–79 y, (n = 183) | ||||
| Age, y | −0.1 (.99) | −0.1 (.93) | 0.1 (.95) | 0.1 (.91) |
| Female | −2.5 (.77) | −5.0 (.48) | −4.9 (.50) | 2.6 (.77) |
| Black | 8.3 (.23) | 8.7 (.21) | 8.1 (.24) | 7.4 (.28) |
| Weight, kg | −0.4 (.21) | — | — | — |
| BMI, kg/m2 | — | −1.2 (.17) | — | — |
| BMI classifications | ||||
| Normal, 18.5–24.9 | — | — | Reference | — |
| Overweight, 25–29.9 | — | — | −7.5 (.28) | — |
| Obese, ≥ 30 | — | — | −10.2 (.32) | — |
| Fat mass, % | — | — | — | −0.2 (.74) |
Notes: BMI = body mass index. Regression equations were performed individually for each adiposity-age group combination. Walking endurance declines were calculated as follow-up—initial. All equations were adjusted for age, sex, race (black vs nonblack), height (only for weight and percent fat mass), physical activity, initial 400-meter performance and time to follow-up.