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Physical activity levels across adult life and grip strength in early old age: updating findings from a British birth cohort

Physical activity levels across adult life and grip strength in early old age: updating findings from a British birth cohort
Physical activity levels across adult life and grip strength in early old age: updating findings from a British birth cohort
Introduction: observational studies do not always find positive associations between physical activity and muscle strength despite intervention studies consistently showing that exercise improves strength in older adults. In previous analyses of the MRC National Survey of Health and Development (NSHD), the 1946 British birth cohort, there was no evidence of an association between leisure time physical activity (LTPA) across adulthood and grip strength at age 53. This study tested the hypothesis that cumulative benefits of LTPA across mid-life on grip strength will have emerged by age 60–64.

Methods: data from the MRC NSHD were used to investigate the associations between LTPA at ages 36, 43, 53 and 60–64 and grip strength at 60–64. Linear regression models were constructed to examine the effect of activity at each age separately and as a cumulative score, including adjustment for potential confounders and testing of life course hypotheses.

Results: there were complete longitudinal data available for 1,645 participants. There was evidence of a cumulative effect of LTPA across mid-life on grip strength at 60–64. Compared with the third of participants who reported the least LTPA participation across the four time points, those in the top third had on average 2.11 kg (95% CI: 0.88, 3.35) stronger grip after adjustments.

Conclusions: increased levels of LTPA across mid-life were associated with stronger grip at age 60–64, in both men and women. As these associations have emerged since age 53, it suggests that LTPA across adulthood may prevent decline in grip strength in early old age.
physical activity, longitudinal study, grip strength, life course models, older people
0002-0729
794-798
Dodds, R.
2f7c0dea-4cd7-4f91-9fd2-a5ff20706870
Kuh, D.
6c5d95a4-433d-4895-bd95-86a7d5fe76a5
Aihie Sayer, A.
fb4c2053-6d51-4fc1-9489-c3cb431b0ffb
Cooper, R.
6cd7b578-a1fa-4511-bc7d-9addc4baf372
Dodds, R.
2f7c0dea-4cd7-4f91-9fd2-a5ff20706870
Kuh, D.
6c5d95a4-433d-4895-bd95-86a7d5fe76a5
Aihie Sayer, A.
fb4c2053-6d51-4fc1-9489-c3cb431b0ffb
Cooper, R.
6cd7b578-a1fa-4511-bc7d-9addc4baf372

Dodds, R., Kuh, D., Aihie Sayer, A. and Cooper, R. (2013) Physical activity levels across adult life and grip strength in early old age: updating findings from a British birth cohort. Age and Ageing, 42 (6), 794-798. (doi:10.1093/ageing/aft124). (PMID:23981980)

Record type: Article

Abstract

Introduction: observational studies do not always find positive associations between physical activity and muscle strength despite intervention studies consistently showing that exercise improves strength in older adults. In previous analyses of the MRC National Survey of Health and Development (NSHD), the 1946 British birth cohort, there was no evidence of an association between leisure time physical activity (LTPA) across adulthood and grip strength at age 53. This study tested the hypothesis that cumulative benefits of LTPA across mid-life on grip strength will have emerged by age 60–64.

Methods: data from the MRC NSHD were used to investigate the associations between LTPA at ages 36, 43, 53 and 60–64 and grip strength at 60–64. Linear regression models were constructed to examine the effect of activity at each age separately and as a cumulative score, including adjustment for potential confounders and testing of life course hypotheses.

Results: there were complete longitudinal data available for 1,645 participants. There was evidence of a cumulative effect of LTPA across mid-life on grip strength at 60–64. Compared with the third of participants who reported the least LTPA participation across the four time points, those in the top third had on average 2.11 kg (95% CI: 0.88, 3.35) stronger grip after adjustments.

Conclusions: increased levels of LTPA across mid-life were associated with stronger grip at age 60–64, in both men and women. As these associations have emerged since age 53, it suggests that LTPA across adulthood may prevent decline in grip strength in early old age.

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Published date: November 2013
Keywords: physical activity, longitudinal study, grip strength, life course models, older people
Organisations: Faculty of Medicine

Identifiers

Local EPrints ID: 360421
URI: http://eprints.soton.ac.uk/id/eprint/360421
ISSN: 0002-0729
PURE UUID: cb58b43d-ac35-4450-98df-514a51fd796b
ORCID for R. Dodds: ORCID iD orcid.org/0000-0003-4968-7678

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Date deposited: 09 Dec 2013 11:03
Last modified: 25 Nov 2019 20:45

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Author: R. Dodds ORCID iD
Author: D. Kuh
Author: A. Aihie Sayer
Author: R. Cooper

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