scholarly journals Epoch length and the physical activity bout analysis: An accelerometry research issue

2013 ◽  
Vol 6 (1) ◽  
Author(s):  
Makoto Ayabe ◽  
Hideaki Kumahara ◽  
Kazuhiro Morimura ◽  
Hiroaki Tanaka
2014 ◽  
Vol 7 (1) ◽  
Author(s):  
Makoto Ayabe ◽  
Hideaki Kumahara ◽  
Kazuhiro Morimura ◽  
Hiroaki Tanaka

PLoS ONE ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. e92040 ◽  
Author(s):  
Taren Sanders ◽  
Dylan P. Cliff ◽  
Chris Lonsdale

2018 ◽  
Vol 7 (9) ◽  
pp. 268 ◽  
Author(s):  
Jungyun Hwang ◽  
Austin Fernandez ◽  
Amy Lu

We assessed the agreement of two ActiGraph activity monitors (wGT3X vs. GT9X) placed at the hip and the wrist and determined an appropriate epoch length for physical activity levels in an exergaming setting. Forty-seven young adults played a 30-min exergame while wearing wGT3X and GT9X on both hip and wrist placement sites and a heart rate sensor below the chest. Intraclass correlation coefficient indicated that intermonitor agreement in steps and activity counts was excellent on the hip and good on the wrist. Bland-Altman plots indicated good intermonitor agreement in the steps and activity counts on both placement sites but a significant intermonitor difference was detected in steps on the wrist. Time spent in sedentary and physical activity intensity levels varied across six epoch lengths and depended on the placement sites, whereas time spent from a 1-s epoch of the hip-worn monitors most accurately matched the relative exercise intensity by heart rate. Hip placement site was associated with better step-counting accuracy for both activity monitors and more valid estimation of physical activity levels. A 1-s epoch was the most appropriate epoch length to detect short bursts of intense physical activity and may be the best choice for data processing and analysis in exergaming studies examining intermittent physical activities.


2017 ◽  
Vol 49 (5S) ◽  
pp. 478
Author(s):  
Vanessa L. Errisuriz ◽  
Jon E. Clutton ◽  
Esbelle M. Jowers ◽  
John B. Bartholomew

2008 ◽  
Vol 295 (3) ◽  
pp. E553-E558 ◽  
Author(s):  
Boubacar Benziane ◽  
Alexander V. Chibalin

The skeletal muscle sodium pump plays a major role in the removal of K+ ions from the circulation postprandial, or after a physical activity bout, thereby preventing the development of hyperkalemia and fatigue. Insulin and muscle contractions stimulate Na+-K+-ATPase activity in skeletal muscle, at least partially via translocation of sodium pump units to the plasma membrane from intracellular stores. The molecular mechanism of this phenomenon is poorly understood. Due to the contradictory reports in the literature, the very existence of the translocation of Na+-K+-ATPase to the skeletal muscle cell surface is questionable. This review summarizes more than 30 years work on the skeletal muscle sodium pump translocation paradigm. Furthermore, the methodological caveats of major approaches to study the sodium pump translocation in skeletal muscle are discussed. An understanding of the molecular regulation of Na+-K+-ATPase in skeletal muscle will have important clinical implications for the understanding of the development of complications associated with the metabolic syndrome, such as cardiovascular diseases or increased muscle fatigue in diabetic patients.


2021 ◽  
pp. 1-7
Author(s):  
Mallory Kobak ◽  
Andrew Lepp ◽  
Michael Rebold ◽  
Ellen Glickman ◽  
Jacob E. Barkley

Purpose: To assess children’s physical activity, sedentary behavior, liking, and motivation during 3 separate simulated recess conditions: playing alone, with their parent participating, and with their peer participating. Methods: Children participated in the 3 separate conditions. During each condition, the children had access to an outdoor playground and sedentary activity options for 30 minutes. Accelerometry recorded the physical activity. Time allocated to sedentary options was monitored via a stopwatch. A visual analog scale was used to assess liking, and motivation was assessed as the children’s willingness to participate in an additional 10 minutes of each condition. Results: The children sat 88% less and were 33% more physically active with their peer versus playing alone. The children also sat 65% less during the parent condition than alone. Lastly, the children reported ≥34% liking and were ≥2-fold more likely to participate in the additional 10-minute activity bout during the parent and peer conditions than alone. The differences were significant (P ≤ .05) except for the children’s decision to participate in the additional 10 minutes in the parent versus the alone condition (P = .058). Conclusions: Relative to the alone condition, the presence of a peer or parent reduced sedentary behavior and increased liking and the motivation to participate in that condition. However, only the presence of a peer increased physical activity versus alone.


2017 ◽  
Vol 49 (5S) ◽  
pp. 166
Author(s):  
David A. White ◽  
Erik A. Willis ◽  
Kimberly J. Reid

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