The relationship of chronotype, objectively-measured physical activity and dementia in older adults

The relationship of objectively measured sedentary time (ST), frequency of breaks in ST, and lower extremity function (LEF) was investigated in a diverse sample aged ≥ 70 years (n = 217). Physical activity (PA) was assessed by accelerometry deriving moderate-vigorous PA (MVPA) minutes per registered hour (MVPA min · hr−1), registered ST (ST min · hr−1), and breaks in ST min · hr−1 (breaks · hr−1). LEF was assessed by the Short Physical Performance Battery. Univariate associations with overall LEF were MVPA (r = .523), ST (r = −.499), and breaks (r = .389). Adjusted linear regression including MVPA min · hr−1, ST min · hr−1, and breaks · hr−1 explained 41.5% of LEF variance. Each additional break · hr−1 was associated with 0.58 point increase in LEF. Breaks and MVPA had strongest independent associations with LEF. Promoting regular breaks might be useful in maintaining or increasing LEF and later life independence. This novel finding is important for the design of effective lifestyle interventions targeting older adults.

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THE RELATIONSHIP OF OBJECTIVELY MEASURED PHYSICAL ACTIVITY TO PHYSICAL PERFORMANCE IN OLDER WOMEN

The Gerontologist ◽

10.1093/geront/gnv203.04 ◽

2015 ◽

Vol 55 (Suppl_2) ◽

pp. 484-484

Keyword(s):

Physical Activity ◽

Older Women ◽

Physical Performance ◽

Objectively Measured ◽

Relationship Of ◽

The Relationship ◽

Objectively Measured Physical Activity

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The Relationship Between Weather and Objectively Measured Physical Activity Among Individuals With COPD

Journal of Cardiopulmonary Rehabilitation and Prevention ◽

10.1097/hcr.0000000000000244 ◽

2017 ◽

Vol 37 (6) ◽

pp. 445-449 ◽

Cited By ~ 7

Author(s):

Shea M. Balish ◽

Gail Dechman ◽

Paul Hernandez ◽

John C. Spence ◽

Ryan E. Rhodes ◽

...

Keyword(s):

Physical Activity ◽

Objectively Measured ◽

The Relationship ◽

Objectively Measured Physical Activity

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Associations between objectively measured physical activity, sedentary behaviour and time in bed among 75+ community-dwelling Danish older adults

BMC Geriatrics ◽

10.1186/s12877-020-01856-6 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Li-Tang Tsai ◽

Eleanor Boyle ◽

Jan C. Brønd ◽

Gry Kock ◽

Mathias Skjødt ◽

...

Keyword(s):

Physical Activity ◽

Older Adults ◽

Sedentary Behavior ◽

Sedentary Behaviour ◽

Sleep Duration ◽

Activity Level ◽

Time In Bed ◽

Objectively Measured ◽

Objectively Measured Physical Activity ◽

Vector Magnitude

Abstract Background Older adults are recommended to sleep 7–8 h/day. Time in bed (TIB) differs from sleep duration and includes also the time of lying in bed without sleeping. Long TIB (≥9 h) are associated with self-reported sedentary behavior, but the association between objectively measured physical activity, sedentary behavior and TIB is unknown. Methods This study was based on cross-sectional analysis of the Healthy Ageing Network of Competence (HANC Study). Physical activity and sedentary behaviour were measured by a tri-axial accelerometer (ActiGraph) placed on the dominant wrist for 7 days. Sedentary behavior was classified as < 2303 counts per minute (cpm) in vector magnitude and physical activity intensities were categorized, as 2303–4999 and ≥ 5000 cpm in vector magnitude. TIB was recorded in self-reported diaries. Participants were categorized as UTIB (usually having TIB 7–9 h/night: ≥80% of measurement days), STIB (sometimes having TIB 7–9 h/night: 20–79% of measurement days), and RTIB (rarely having TIB 7–9 h/night: < 20% of measurement days). Multinominal regression models were used to calculate the relative risk ratios (RRR) of being RTIB and STIB by daily levels of physical activity and SB, with UTIB as the reference group. The models were adjusted for age, sex, average daily nap length and physical function. Results Three hundred and fourty-one older adults (median age 81 (IQR 5), 62% women) were included with median TIB of 8 h 21 min (1 h 10 min)/day, physical activity level of 2054 (864) CPM with 64 (15) % of waking hours in sedentary behavior. Those with average CPM within the highest tertile had a lower RRR (0.33 (0.15–0.71), p = 0.005) for being RTIB compared to those within the lowest tertile of average CPM. Accumulating physical activity in intensities 2303–4999 and ≥ 5000 cpm/day did not affect the RRR of being RTIB. RRR of being RTIB among highly sedentary participants (≥10 h/day of sedentary behavior) more than tripled compared to those who were less sedentary (3.21 (1.50–6.88), p = 0.003). Conclusions For older adults, being physically active and less sedentary was associated with being in bed for 7–9 h/night for most nights (≥80%). Future longitudinal studies are warranted to explore the causal relationship sbetween physical activity and sleep duration.

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Longitudinal changes in daily patterns of objectively measured physical activity after falls in older adults with varying degrees of glaucoma

EClinicalMedicine ◽

10.1016/j.eclinm.2021.101097 ◽

2021 ◽

Vol 40 ◽

pp. 101097

Author(s):

Jian-Yu E ◽

Aleksandra Mihailovic ◽

Jennifer A. Schrack ◽

Catalina Garzon ◽

Tianjing Li ◽

...

Keyword(s):

Physical Activity ◽

Older Adults ◽

Longitudinal Changes ◽

Falls In Older Adults ◽

Objectively Measured ◽

Objectively Measured Physical Activity ◽

Daily Patterns

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Every step counts: synthesising reviews associating objectively measured physical activity and sedentary behaviour with clinical outcomes in community-dwelling older adults

The Lancet Healthy Longevity ◽

10.1016/s2666-7568(21)00203-8 ◽

2021 ◽

Vol 2 (11) ◽

pp. e764-e772

Author(s):

Keenan A Ramsey ◽

Carel G M Meskers ◽

Andrea B Maier

Keyword(s):

Physical Activity ◽

Older Adults ◽

Sedentary Behaviour ◽

Clinical Outcomes ◽

Community Dwelling ◽

Step Counts ◽

Objectively Measured ◽

Community Dwelling Older Adults ◽

Objectively Measured Physical Activity

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Walk Score and objectively measured physical activity within a national cohort

Journal of Epidemiology & Community Health ◽

10.1136/jech-2017-210245 ◽

2019 ◽

Vol 73 (6) ◽

pp. 549-556 ◽

Cited By ~ 2

Author(s):

Erica Twardzik ◽

Suzanne Judd ◽

Aleena Bennett ◽

Steven Hooker ◽

Virginia Howard ◽

...

Keyword(s):

Physical Activity ◽

Racial Differences ◽

Vigorous Physical Activity ◽

Direct Effects ◽

Walk Score ◽

National Cohort ◽

Objectively Measured ◽

The Relationship ◽

Objectively Measured Physical Activity ◽

Daily Time

BackgroundThere have been mixed findings regarding the relationship between walkability and level of physical activity in adults.MethodsParticipants from The REasons for Geographic and Racial Differences in Stroke (REGARDS) national cohort (N=7561) were used to examine the association between Walk Score and physical activity measured via accelerometry. The subsample included geographically diverse adults, who identified as black or white, and were over the age of 45. Linear regression was used to examine the direct effects, as well as the interaction, of Walk Score by sex, age and race.ResultsThe majority of participants lived in a ‘Very Car-Dependent’ location (N=4115). Only 527 lived in a location that was ‘Very Walkable/Walker’s Paradise’. Living in a location with a Walk Score of ‘Very Car-Dependent’ compared with ‘Very Walkable/Walker’s Paradise’ was associated with 19% (0.81; 95% CI 0.73 to 0.90) lower predicted minutes of moderate to vigorous physical activity per day, after adjustment for covariates. There was no evidence of statistically significant interactions between Walk Score and sex, age or race (p>0.05).ConclusionAccumulated daily time in moderate to vigorous physical activity was higher for participants living in neighbourhoods designated as ‘Very Walkable/Walker’s Paradise’. This effect was not moderated by sex, age or race of participants.

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