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Full-Text Articles in Life Sciences

The Effect Of Elbow Flexion Speed And Partial Limb Occlusion On Emg Activity, John Sampson, Herbert Groeller, Darryl Mcandrew, R Achttien, J Stege Aug 2014

The Effect Of Elbow Flexion Speed And Partial Limb Occlusion On Emg Activity, John Sampson, Herbert Groeller, Darryl Mcandrew, R Achttien, J Stege

Darryl J McAndrew

This investigation aimed to determine the neuromuscular response of the bicep brachii during heavy (6RM) dynamic resistance exercise performed to volitional exhaustion. Electromyographic (EMG) activity was compared in twelve male subjects performing dominant-limb elbow flexion exercise during four conditions: i) Explosive concentric and eccentric (SSC); ii) Explosive concentric, control eccentric (EC); iii) control (C); and iv) control with limb occlusion (CO) (110mmHg). CO and SSC are reported to increase motor unit activity when compared to control exercise (2 second flexion, 2 second extension). It was hypothesised that EMG activity will be higher in conditions of explosive exercise. Surface EMG activity …


Emg Activity And Total Work Reduction In Occluded And Non-Occluded Resistance Exercise Conditions, John Sampson, Herbert Groeller, Darryl Mcandrew, Heath Kilah Aug 2014

Emg Activity And Total Work Reduction In Occluded And Non-Occluded Resistance Exercise Conditions, John Sampson, Herbert Groeller, Darryl Mcandrew, Heath Kilah

Darryl J McAndrew

No abstract provided.


Decoupling Of Stretch Reflex And Background Muscle Activity During Anticipatory Postural Adjustments In Humans, Siddharth Vedula, Robert Kearney, Ross Wagner, Paul Stapley Jan 2013

Decoupling Of Stretch Reflex And Background Muscle Activity During Anticipatory Postural Adjustments In Humans, Siddharth Vedula, Robert Kearney, Ross Wagner, Paul Stapley

Dr Paul J Stapley

We studied the evolution of stretch reXexes in relation to background electromyographic (EMG) activity in the soleus muscle preceding the onset of voluntary arm raise movements. Our objective was to investigate if changes in reXex EMG and muscle activity occur simultaneously and are similarly scaled in amplitude. Ten human subjects stood with each foot on pedals able to exert short dorsiXexor pulses during stance. Subjects were asked to product consistent voluntary arm raise movements to a target upon a visual cue. In ¼ of trials, no pulse perturbations were given, but in the remaining ¾’s of all trials pulses were …


Consumer Response To Healthy Eating, Physical Activity And Weight-Related Recommendations: A Systematic Review, S Boylan, Jimmy Chun Yu Louie, T Gill Nov 2012

Consumer Response To Healthy Eating, Physical Activity And Weight-Related Recommendations: A Systematic Review, S Boylan, Jimmy Chun Yu Louie, T Gill

Jimmy Chun Yu Louie

Strong evidence linking poor diet and lack of physical activity to risk of obesity and related chronic disease has supported the development and promotion of guidelines to improve population health. Still, obesity continues to escalate as a major health concern, and so the impact of weight-related guidelines on behaviour is unclear. The aim of this review was to examine consumer response to weight-related guidelines. A systematic literature search was performed using Medline, PsycInfo, ProQuest Central and additional searches using Google and reference lists. Of the 1,765 articles identified, 46 relevant titles were included. Most studies examined attitudes towards content, source, …


Emg Activity And Total Work Reduction In Occluded And Non-Occluded Resistance Exercise Conditions, John Sampson, Herbert Groeller, Darryl Mcandrew, Heath Kilah Jan 2012

Emg Activity And Total Work Reduction In Occluded And Non-Occluded Resistance Exercise Conditions, John Sampson, Herbert Groeller, Darryl Mcandrew, Heath Kilah

John Sampson

No abstract provided.


The Effect Of Elbow Flexion Speed And Partial Limb Occlusion On Emg Activity, John Sampson, Herbert Groeller, Darryl Mcandrew, R Achttien, J Stege Jan 2012

The Effect Of Elbow Flexion Speed And Partial Limb Occlusion On Emg Activity, John Sampson, Herbert Groeller, Darryl Mcandrew, R Achttien, J Stege

John Sampson

This investigation aimed to determine the neuromuscular response of the bicep brachii during heavy (6RM) dynamic resistance exercise performed to volitional exhaustion. Electromyographic (EMG) activity was compared in twelve male subjects performing dominant-limb elbow flexion exercise during four conditions: i) Explosive concentric and eccentric (SSC); ii) Explosive concentric, control eccentric (EC); iii) control (C); and iv) control with limb occlusion (CO) (110mmHg). CO and SSC are reported to increase motor unit activity when compared to control exercise (2 second flexion, 2 second extension). It was hypothesised that EMG activity will be higher in conditions of explosive exercise. Surface EMG activity …