Lower limb blood flow and mean arterial pressure during standing and seated work: Implications for workplace posture recommendations

Antle, David M.; Cormier, Lauren; Findlay, Megan; Miller, Leon L.; Côté, Julie N.

doi:10.1016/j.pmedr.2018.02.016

Cited by 40 publications

(29 citation statements)

References 36 publications

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“…Standing was not intended to match the energy expenditure of walking or body weight exercises, but if standing up is a person's only feasible activity following breakfast, then it is clearly more beneficial than sitting down. The mechanisms of glucose metabolism during standing have not been studied, but lower limb blood flow is increased during standing compared to sitting [4] and electromyograph (EMG) activity of the large muscle groups required for standing is twofold above that when sitting [19]. So, one may speculate that standing increases glucose delivery to muscle tissue during contraction-mediated glucose uptake.…”

Section: Discussionmentioning

confidence: 99%

Immediate post-breakfast physical activity improves interstitial postprandial glycemia: a comparison of different activity-meal timings

Solomon

Tarry

Hudson

et al. 2019

Pflugers Arch - Eur J Physiol

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The optimal timing between meal ingestion and simple physical activity for improving blood glucose control is unknown. This study compared the effects of physical activity on postprandial interstitial glucose responses when the activity was conducted either immediately before, immediately after, or 30 min after breakfast. Forty-eight adults were randomized to three separate physical activity interventions: standing still (for 30 min), walking (for 30 min), and bodyweight exercises (3 sets of 10 squats, 10 push-ups, 10 lunges, 10 sit-ups). In each intervention, 16 participants completed four trials (A to D) during which a 500 kcal mixed nutrient liquid breakfast meal was consumed. Interstitial glucose responses were recorded using continuous glucose monitoring for 2 h after the meal. The activity was completed either after the glucose monitoring period (trial A; control) or immediately before (trial B), immediately after (trial C), or 30 min after (trial D) the breakfast. Mean, coefficient of variance (CV), and area under the curve (AUC) for glucose were calculated and compared between the four trials. Walking and bodyweight exercises immediately after the meal improved mean, CV, and AUC glucose (P ≤ 0.05 vs. control), while standing immediately after the meal only improved AUC glucose (P ≤ 0.05 vs. control) and nearly improved mean glucose (P = 0.06). Mean, CV, and AUC glucose were not affected by standing, walking, or bodyweight exercise conducted immediately before, or 30 min after the meal (all P > 0.05 vs. control). Energy intake (diet records) and energy expenditure (Actigraph) were consistent throughout the studies and did not influence the findings. Low-to moderate-intensity activity should be implemented soon after eating to improve glucose control following breakfast. The type of activity appears less important than the timing. These findings will help optimize exercise-meal timing in general health guidelines. ClinicalTrials.gov Identifier: NCT03730727Open Access This article is distributed under the terms of the Creative Comm ons Attribution 4.0 International License (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Section: Discussionmentioning

confidence: 99%

Immediate post-breakfast physical activity improves interstitial postprandial glycemia: a comparison of different activity-meal timings

Solomon

Tarry

Hudson

et al. 2019

Pflugers Arch - Eur J Physiol

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“…The 24‐hours mean arterial pressure (24‐hours MAP) was calculated from the mean values of 24‐hours systolic and diastolic blood pressures. The computational formula was (systolic blood pressure + 2 × diastolic blood pressure)/3 …”

Section: Methodsmentioning

confidence: 99%

Association of thyroid function with white coat hypertension and sustained hypertension

Cai

Peng

Chen

et al. 2019

J of Clinical Hypertension

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This study aimed to explore the relationship of thyroid-stimulating hormone (TSH), free triiodothyronine (FT3), and free thyroxine (FT4) levels with hypertension subtypes. 1056 euthyroid adults were included as research samples. They underwent measurement of clinic blood pressure and 24-hours ambulatory blood pressure monitoring. Then, they were divided into normotension (NT), white coat hypertension (WCH), masked hypertension (MHT), and sustained hypertension (SHT) groups. The 24-hours dynamic electrocardiogram was performed to analyze the heart rate variability (HRV), so as to reflect the cardiac autonomic function. The relationship between hypertension subtypes, thyroid function, and HRV was analyzed. The TSH concentration was significantly higher in the SHT group than in the NT group (P = 0.001). The FT3 concentration was higher in the SHT group than in the NT and MHT groups (P = 0.013, P = 0.008), while the FT4 concentration was significantly higher in the WCH group than in the NT group (P = 0.002). The changes in HRV were observed between the SHT, WCH, and MHT groups and the NT groups, as well as between the SHT and the MHT groups. The multiple linear regression analysis also showed that FT3, HRV (RMSSD and PNN50), and blood pressure levels linearly correlated with one another (P < 0.05). Meanwhile, the linear regression analysis showed a linear negative correlation between FT4 and HRV (SDANN) in the WCH + NT group (P = 0.001). Thyroid function was closely related to hypertension subtypes such as WCH probably due to the changes in the cardiac autonomic function. | 675 CAI et Al.

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“…However, workers exposed to WBV are often also exposed to a number of other risk factors that may contribute to the development of these negative health effects. These risk factors include maintaining a static posture for a long-period of time (Antle et al 2018; Tachi et al 2004), torque or twisting of the abdomen to view the area around the vehicle (Palmer et al 2008), and heavy lifting that often occurs when a vehicle is being loaded or unloaded (Palmer et al 2012; Palmer et al 2008). In addition to vibration and the physical exposures associated with a job, there may be other co-exposures to chemicals or certain environmental conditions that contribute to the development of disease or injury in workers.…”

Section: Introductionmentioning

confidence: 99%

“…Exposure to WBV has primarily been associated with an increase in lower back, neck and shoulder pain (Bovenzi,Betta 1994; Bovenzi 1996; Bovenzi,Hulshof 1999; Hulshof et al 2006; Bovenzi 2009). Along with vibration, other exposure factors that may induce musculoskeletal pain in workers include maintaining statistic positions for a long-period of time and twisting or torque while seated (Tachi et al 2004; Stewart, Taneja,Medow 2007; Antle et al 2018). These factors, along with vibration from the truck, and impact from driving on rough roads, can result in compression of the disks and soft tissue strain, which both contribute to back pain (Cann, Salmoni,Eger 2004; Smets, Eger,Grenier 2010; Grenier, Eger,Dickey 2010).…”

Section: Introductionmentioning

confidence: 99%

Health effects associated with occupational exposure to hand-arm or whole body vibration

Krajnak

2018

Journal of Toxicology and Environmental Health, Part B

107

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Workers in a number of different occupational sectors are exposed to workplace vibration on a daily basis. This exposure can come through use of powered-hand tools or hand-transmitted vibration (HTV). Workers can also be exposed to whole body vibration (WBV) by driving delivery vehicles, earth moving equipment, or through the use of tools that generate vibration at low dominant frequencies and high amplitudes, such as jack hammers. Occupational exposure to vibration has been associated with an increased risk of musculoskeletal pain in the back, neck, hands, shoulders and hips. It may also contribute to the development of peripheral and cardiovascular disorders and gastrointestinal problems. In addition, there are more recent data suggesting that occupational exposure to vibration may increase the risk of developing certain cancers. This paper provides a review of the occupations where exposure to vibration is most prevalent, and a description of the health effects associated with occupational exposure to vibration. The various experimental methods used to measure and describe the characteristics of vibration generated by various tools and vehicles, the etiology of vibration-induced disorders, and how these data have been used to assess and improve intervention strategies and equipment that reduces the transmission of vibration to the body. Finally, there is a discussion of the research gaps that need to be investigated to further reduce the incidence of vibration-induced illnesses and injuries.

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Lower limb blood flow and mean arterial pressure during standing and seated work: Implications for workplace posture recommendations

Cited by 40 publications

References 36 publications

Immediate post-breakfast physical activity improves interstitial postprandial glycemia: a comparison of different activity-meal timings

Immediate post-breakfast physical activity improves interstitial postprandial glycemia: a comparison of different activity-meal timings

Association of thyroid function with white coat hypertension and sustained hypertension

Health effects associated with occupational exposure to hand-arm or whole body vibration

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