Exploring the Effects of Cognitive Load on Muscle Activation during Functional Upper Extremity Tasks

2009 ◽  
pp. 17-18 ◽  
Author(s):  
D. E. Nathan ◽  
D. C. Jeutter
Keyword(s):  
Cognitive Load ◽  
Upper Extremity ◽  
Muscle Activation

scholarly journals Elbow Joint Fatigue and Bench-Press Training

2014 ◽  
Vol 49 (3) ◽  
pp. 317-321 ◽  
Author(s):  
Yen-Po Huang ◽  
You-Li Chou ◽  
Feng-Chun Chen ◽  
Rong-Tyai Wang ◽  
Ming-Jer Huang ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Upper Extremity ◽  
Athletic Training ◽  
Cycle Time ◽  
Elbow Joint ◽  
Muscle Activation ◽  
Bench Press ◽  
Lateral Force ◽  
Joint Force ◽  
Muscle Strengthening

Context: Bench-press exercises are among the most common form of training exercise for the upper extremity because they yield a notable improvement in both muscle strength and muscle endurance. The literature contains various investigations into the effects of different bench-press positions on the degree of muscle activation. However, the effects of fatigue on the muscular performance and kinetics of the elbow joint are not understood fully. Objective: To investigate the effects of fatigue on the kinetics and myodynamic performance of the elbow joint in bench-press training. Design: Controlled laboratory study. Setting: Motion research laboratory. Patients or Other Participants: A total of 18 physically healthy male students (age = 19.6 ± 0.8 years, height = 168.7 ± 5.5 cm, mass = 69.6 ± 8.6 kg) participated in the investigation. All participants were right-hand dominant, and none had a history of upper extremity injuries or disorders. Intervention(s): Participants performed bench-press training until fatigued. Main Outcome Measure(s): Maximal possible number of repetitions, cycle time, myodynamic decline rate, elbow-joint force, and elbow-joint moment. Results: We observed a difference in cycle time in the initial (2.1 ± 0.42 seconds) and fatigue (2.58 ± 0.46 seconds) stages of the bench-press exercise (P = .04). As the participants fatigued, we observed an increase in the medial-lateral force (P = .03) and internal-external moment (P ≤ .04) acting on the elbow joint. Moreover, a reduction in the elbow muscle strength was observed in the elbow extension-flexion (P ≤ .003) and forearm supination-pronation (P ≤ .001) conditions. Conclusions: The results suggest that performing bench-press exercises to the point of fatigue increases elbow-joint loading and may further increase the risk of injury. Therefore, when clinicians design bench-press exercise regimens for general athletic training, muscle strengthening, or physical rehabilitation, they should control carefully the maximal number of repetitions.

Functional reach-to-grasp and muscle activation patterns before and after upper extremity surgery in patients with cerebral palsy

2013 ◽  
Vol 38 ◽  
pp. S30
Author(s):  
Marije De Bruin ◽  
DirkJan Veeger ◽  
Michiel Kreulen ◽  
Mark JC Smeulders ◽  
Sicco A Bus
Keyword(s):  
Cerebral Palsy ◽  
Upper Extremity ◽  
Muscle Activation ◽  
Reach To Grasp ◽  
Activation Patterns ◽  
Muscle Activation Patterns ◽  
Functional Reach ◽  
Before And After

Comparison of Upper Extremity Muscle Activation Between Different Inertial Exercise Equipment

2014 ◽  
Vol 46 ◽  
pp. 669
Author(s):  
Amanda Mitchell ◽  
Julie Ralston ◽  
George Davies ◽  
Bryan L. Riemann
Keyword(s):  
Upper Extremity ◽  
Muscle Activation ◽  
Exercise Equipment

Muscular loads associated with floor vacuuming with cordless stick cleaners

2021 ◽  
Vol 65 (1) ◽  
pp. 1381-1384
Author(s):  
Yujin Kwon ◽  
Gwanseob Shin
Keyword(s):  
Upper Extremity ◽  
Muscle Activation ◽  
Upper Extremities ◽  
Myoelectric Activity ◽  
Shoulder Muscles ◽  
Occupational Tasks ◽  
The Mean ◽  
House Painting ◽  
User Friendly ◽  
Ergonomic Interventions

The muscular loads of the upper extremity and chest muscles were assessed during floor vacuuming with stick vacuum cleaners. Ten participants conducted vacuuming with two stick cleaners (weight: 3.03 kg, 3.56 kg) on tiled and carpeted floors while the myoelectric activity of the upper extremity and chest muscles were collected. The mean muscle activation levels ranged from 15.5% to 45.7% of the maximum voluntary capacity. Greater muscular loads were observed on the forearm and shoulder muscles when vacuuming with repeated curved strokes (vs. straight storkes), and on the chest muscle when vacuuming the carpeted floor. The range of muscular loads were higher than that of occupational tasks such as house painting and dental drilling, which have been known as intensive activities for upper extremities. The results suggest that floor vacuuming with stick vacuum cleaners is physically demanding for household consumers. Ergonomic interventions such as more user-friendly design should be considered.

scholarly journals Upper Extremity Kinematics and Muscle Activation Patterns in Subjects With Facioscapulohumeral Dystrophy

2014 ◽  
Vol 95 (9) ◽  
pp. 1731-1741 ◽  
Author(s):  
Arjen Bergsma ◽  
Alessio Murgia ◽  
Edith H. Cup ◽  
Paul P. Verstegen ◽  
Kenneth Meijer ◽  
...  
Keyword(s):  
Upper Extremity ◽  
Muscle Activation ◽  
Activation Patterns ◽  
Facioscapulohumeral Dystrophy ◽  
Muscle Activation Patterns

Constrained handgrip force decreases upper extremity muscle activation and arm strength

Ergonomics ◽  
2009 ◽  
Vol 52 (9) ◽  
pp. 1144-1152 ◽  
Author(s):  
Martin P.H. Smets ◽  
James R. Potvin ◽  
Peter J. Keir
Keyword(s):  
Upper Extremity ◽  
Muscle Activation ◽  
Arm Strength

scholarly journals Upper extremity muscle activation during recovery of reaching in subjects with post-stroke hemiparesis

2007 ◽  
Vol 118 (1) ◽  
pp. 164-176 ◽  
Author(s):  
Joanne M. Wagner ◽  
Alexander W. Dromerick ◽  
Shirley A. Sahrmann ◽  
Catherine E. Lang
Keyword(s):  
Upper Extremity ◽  
Muscle Activation ◽  
Post Stroke
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