Document Detail

Elbow Joint Fatigue and Bench-Press Training.
MedLine Citation:
PMID:  24533529     Owner:  NLM     Status:  Publisher    
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.
Yen-Po Huang; You-Li Chou; Feng-Chun Chen; Rong-Tyai Wang; Ming-Jer Huang; Paul Pei-Hsi Chou
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-2-17
Journal Detail:
Title:  Journal of athletic training     Volume:  -     ISSN:  1938-162X     ISO Abbreviation:  J Athl Train     Publication Date:  2014 Feb 
Date Detail:
Created Date:  2014-2-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9301647     Medline TA:  J Athl Train     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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