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Regulation of Stroke Volume

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The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...

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Sedentary behaviour and stroke: foundational knowledge is crucial.

Olaf Verschuren¹, Gillian Mead, Anne Visser-Meily

¹Brain Center Rudolf Magnus and Center of Excellence for Rehabilitation Medicine, De Hoogstraat Rehabilitation, University Medical Center Utrecht, Rembrandtkade 10, 3583 TM, Utrecht, The Netherlands, o.verschuren@dehoogstraat.nl.

Translational Stroke Research

|September 14, 2014

Summary

Physical activity benefits stroke survivors. Reducing sedentary time alongside moderate to vigorous exercise may improve health outcomes for adults post-stroke, distinct from exercise alone.

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Area of Science:

Rehabilitation Medicine
Exercise Physiology
Public Health

Background:

Physical activity is crucial for adult health, particularly for stroke survivors.
Current exercise programs for stroke patients primarily focus on moderate to vigorous physical activity (MVPA).
Sedentary behavior is increasingly recognized as a distinct health risk, separate from insufficient MVPA, with unique physiological impacts.

Purpose of the Study:

To review current knowledge on sedentary behavior in adults with stroke.
To identify research gaps and future directions for understanding sedentary behavior in this population.
To explore the potential benefits of reducing sedentary behavior concurrently with increasing MVPA for stroke survivors.

Main Methods:

Literature review of existing studies on physical activity and sedentary behavior in stroke survivors.
Analysis of physiological mechanisms linking sedentary behavior to health outcomes.
Discussion of current research limitations and proposed future research agendas.

Main Results:

Sedentary behavior is prevalent in adults with stroke and is physiologically distinct from a lack of MVPA.
Limited research currently exists on sedentary behavior patterns and interventions in stroke populations.
Concurrent strategies to increase MVPA and decrease sedentary time may offer unique health benefits.

Conclusions:

Sedentary behavior represents a critical, understudied area in stroke rehabilitation.
Future research should focus on quantifying sedentary behavior and its specific impact on stroke recovery.
Integrating sedentary behavior reduction into exercise programs could enhance health for adults with stroke.