TY - JOUR
T1 - Obesity History and Daily Patterns of Physical Activity at Age 60-64 Years
T2 - Findings from the MRC National Survey of Health and Development
AU - Cooper, Rachel
AU - Huang, Lei
AU - Hardy, Rebecca
AU - Crainiceanu, Adina
AU - Harris, Tamara
AU - Schrack, Jennifer A.
AU - Crainiceanu, Ciprian
AU - Kuh, Diana
N1 - Funding Information:
R.C., R.H., and D.K. are supported by the UK Medical Research Council (Programme codes: MC_UU_12019/1, MC_UU_12019/2, and MC_ UU_12019/4). L.H. and C.C. are supported by grants from the National Heart, Lung and Blood Institute (5R01HL123407-02) and the National Institute of Neurological Disorders and Stroke (5R01NS060910-07). J.A.S. is supported by the National Institute on Aging (K01AG048765 and HHSN311210300177P). T.H. is supported by the National Institute on Aging, Intramural Research Program. The MRC National Survey of Health and Development is funded by the UK Medical Research Council.
Publisher Copyright:
© The Author 2017. Published by Oxford University Press on behalf of The Gerontological Society of America.
PY - 2017/10/1
Y1 - 2017/10/1
N2 - Background The aim of this study was to investigate associations of current body mass index (BMI) and obesity history with daily patterns of physical activity. Methods At age 60-64, participants from a British birth cohort study wore accelerometers for 5 days. Accelerometry counts were log-transformed and mean log-counts were used to derive a summary variable indicating total daily log-activity counts. Among those with complete data (n = 1,388) the associations of current BMI and age of first obesity were examined with: (a) total daily log-activity counts and (b) total log-activity counts in four segments of the day. Results Higher current BMI and younger age at obesity were strongly associated with lower levels of total daily activity at age 60-64 even after adjustment for sex, socioeconomic factors, and health status. The fully-adjusted mean difference in total daily log-activity counts was ' '581.7 (95% confidence interval: ' '757.2, ' '406.3) when comparing BMI ≥35 kg/m 2 with <25 kg/m 2, representing an 18.4% difference. Participants who had been obese since early adulthood had the lowest levels of activity (mean difference in total daily log-activity counts was ' '413.1 (' '638.1, ' '188.2) when comparing those who were obese by age 26 or 36 with those who were never obese, representing a 13.1% difference). Conclusions Obese older adults may require targeted interventions and additional support to improve their daily activity levels. As younger generations with greater lifetime exposure to obesity reach old age the proportion of adults achieving sufficient levels of activity to realize its associated health benefits is likely to decline.
AB - Background The aim of this study was to investigate associations of current body mass index (BMI) and obesity history with daily patterns of physical activity. Methods At age 60-64, participants from a British birth cohort study wore accelerometers for 5 days. Accelerometry counts were log-transformed and mean log-counts were used to derive a summary variable indicating total daily log-activity counts. Among those with complete data (n = 1,388) the associations of current BMI and age of first obesity were examined with: (a) total daily log-activity counts and (b) total log-activity counts in four segments of the day. Results Higher current BMI and younger age at obesity were strongly associated with lower levels of total daily activity at age 60-64 even after adjustment for sex, socioeconomic factors, and health status. The fully-adjusted mean difference in total daily log-activity counts was ' '581.7 (95% confidence interval: ' '757.2, ' '406.3) when comparing BMI ≥35 kg/m 2 with <25 kg/m 2, representing an 18.4% difference. Participants who had been obese since early adulthood had the lowest levels of activity (mean difference in total daily log-activity counts was ' '413.1 (' '638.1, ' '188.2) when comparing those who were obese by age 26 or 36 with those who were never obese, representing a 13.1% difference). Conclusions Obese older adults may require targeted interventions and additional support to improve their daily activity levels. As younger generations with greater lifetime exposure to obesity reach old age the proportion of adults achieving sufficient levels of activity to realize its associated health benefits is likely to decline.
KW - Aging
KW - BMI
KW - Birth cohort
KW - Daily patterns of activity
KW - Life course
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U2 - 10.1093/gerona/glw331
DO - 10.1093/gerona/glw331
M3 - Article
C2 - 28329086
AN - SCOPUS:85030618051
SN - 1079-5006
VL - 72
SP - 1424
EP - 1430
JO - Journals of Gerontology - Series A Biological Sciences and Medical Sciences
JF - Journals of Gerontology - Series A Biological Sciences and Medical Sciences
IS - 10
ER -