The courses of objective physical activity and the association with sleepiness during a 2-week-on/2-week-off offshore shift rotation: an observational repeated-measures study

Abstract Background Offshore workers are assumed to have poor health behaviours, but no studies have yet examined physical activity (PA) during a full offshore shift rotation period, including both work and at home periods. Furthermore, the relationship of PA with sleepiness, a prevalent safety hazard offshore, is not known. This study aimed to examine (1) the courses of objectively measured PA in offshore workers during pre-, offshore and post-offshore periods, and (2) the association between PA and self-reported sleepiness. Methods An observational repeated measures study was conducted among 36 offshore workers during a full 2-week on/2-week off offshore shift rotation. Objective PA was assessed using Daytime Activity Averages (DAA) from actigraph recordings. Sleepiness was assessed using next-morning Karolinska Sleepiness Scale (KSS) scores. The courses of PA over time were analysed with Linear Mixed Models (LMM). Parallel LMM were used to assess the longitudinal relationship between PA and sleepiness, both on a between-person and within-person level. Results The courses of PA were not significantly different between the pre-, offshore, and post-offshore periods. In addition, between-person trends of PA and sleepiness were not associated (p ranges between 0.08─0.99) and PA did not affect next-morning sleepiness on a within-person level (p = 0.15). Conclusions PA levels during the offshore working period were not different from PA levels at home. Furthermore, PA was not associated with next-morning sleepiness. Further research should focus on different levels of PA including its intensity level.

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Isotemporal Analysis of the Association of Objectively Measured Physical Activity With Depressive Symptoms: Results From Hispanic Community Health Study/Study of Latinos (HCHS/SOL)

Journal of Physical Activity and Health ◽

10.1123/jpah.2016-0648 ◽

2017 ◽

Vol 14 (9) ◽

pp. 733-739 ◽

Cited By ~ 9

Author(s):

Chad D. Rethorst ◽

Ashley E. Moncrieft ◽

Marc D. Gellman ◽

Elva M. Arredondo ◽

Christina Buelna ◽

...

Keyword(s):

Physical Activity ◽

Depressive Symptoms ◽

Community Health ◽

Sedentary Behavior ◽

Health Study ◽

Hispanic Community ◽

Hispanic Latinos ◽

Objectively Measured ◽

Relationship Of ◽

The Relationship

Background:The burden of depression among Hispanics/Latinos indicates the need to identify factors related to depressive symptoms. This paper examines the relationship of physical activity (PA) and sedentary behavior (SB) with depressive symptoms in Hispanic/Latinos.Methods:The Hispanic Community Health Study / Study of Latinos (HCHS/SOL) is a population-based, cohort study of Hispanic/Latinos in 4 United States metropolitan areas. Objectively measured PA was coded into: sedentary behavior (SB), light-intensity (LPA), moderate-intensity (MPA), and vigorous-intensity (VPA); and the Center for Epidemiological Studies Depression Scale-10 assessed depressive symptoms. Multiple regression analysis utilizing isotemporal substitution, adjusted for relevant covariates, examined PA as predictors of depressive symptoms.Results:Substitution of 1 hour of SB with VPA resulted in a significant decrease in depressive symptoms (β = –1.215, P = .021). Similar decreases were observed when VPA replaced LPA (β = –1.212, P = .021) and MPA (β = –1.50 P = .034). MPA and LPA were not associated with lower depressive symptoms.Conclusions:Previous research has focused on the relationship of MVPA on depressive symptoms. Our results suggest these constructs should be examined separately as they may have unique relationships with depressive symptoms. The association of SB with greater depressive symptoms confirms previous reports.

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The Relationship Of Physical Activity Level (Self-reported Versus Objectively Measured) With Depression, Satisfaction With Life, And Cognitive Function In Older Adults

Medicine & Science in Sports & Exercise ◽

10.1249/01.mss.0000518176.22369.66 ◽

2017 ◽

Vol 49 (5S) ◽

pp. 469-470 ◽

Cited By ~ 1

Author(s):

Kelsey D. Loss ◽

Lindsay M. Tyree ◽

Kelsey L. Owens ◽

Victoria E. Warren ◽

Kyle L. Timmerman

Keyword(s):

Physical Activity ◽

Older Adults ◽

Cognitive Function ◽

Physical Activity Level ◽

Satisfaction With Life ◽

Activity Level ◽

Objectively Measured ◽

Relationship Of ◽

The Relationship

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Objectively Measured Sedentary Time and its Association With Physical Function in Older Adults

Journal of Aging and Physical Activity ◽

10.1123/japa.2013-0042 ◽

2014 ◽

Vol 22 (4) ◽

pp. 474-481 ◽

Cited By ~ 48

Author(s):

Mark G. Davis ◽

Kenneth R. Fox ◽

Afroditi Stathi ◽

Tanya Trayers ◽

Janice L. Thompson ◽

...

Keyword(s):

Physical Activity ◽

Older Adults ◽

Sedentary Time ◽

Later Life ◽

Lifestyle Interventions ◽

Lower Extremity Function ◽

Point Increase ◽

Objectively Measured ◽

Relationship Of ◽

The Relationship

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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