Document Detail


Enhancement of jump performance after a 5-RM squat is associated with postactivation potentiation.
MedLine Citation:
PMID:  21229259     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Weight lifting exercise may induce postactivation potentiation (PAP), thereby enhancing performance of a subsequent biomechanically similar "explosive" movement. However, it has not been shown that weight lifting induces PAP, indicated as potentiation of muscle twitch force. Therefore, the present study tested whether a five repetition maximum squat (5-RM squat) both induced PAP and increased the height of subsequently performed counter-movement jumps (CMJs). Eleven male athletes completed four laboratory sessions on separate days. Two sessions determined whether the 5-RM squat induced PAP: in one, a quadriceps maximal twitch was evoked immediately before and 8 min after a set of five CMJs (control); in the other, a twitch was evoked before a CMJ set, which was followed by a 4-min rest, a 5-RM squat, a 4-min rest, and a second twitch. Another two sessions tested the effect of the 5-RM squat on jump performance: in one session, two sets of five CMJs were performed with an 8-min rest between the sets (control); in the second, a 5-RM squat was performed 4 min after the first set of CMJs, and then after another 4 min the second set of CMJs was performed. Neither twitch torque nor CMJ height changed in the control sessions (P > 0.05). In contrast, interpolation of the 5-RM squat increased (P < 0.05) both twitch torque (49.5 ± 7.8 to 54.8 ± 11.9 N m; i.e., PAP = 10.7%) and CMJ height (48.1 ± 5.6 to 49.5 ± 5.9 cm; 2.9%). Since PAP was present at the time when CMJ height increased, it was concluded that PAP may have contributed to the increased CMJ height after a 5-RM squat.
Authors:
Cameron J Mitchell; Digby G Sale
Related Documents :
17365529 - Quantification of spinning bike performance during a standard 50-minute class.
23930549 - The relationships among critical power determined from a 3-min all-out test, respirator...
9228819 - Mechanisms of vowel recognition for ineraid patients fit with continuous interleaved sa...
3279519 - Aerobic fitness and the physiological stress response: a critical evaluation.
24331639 - Lung function and gas exchange in eisenmenger syndrome and their impact on exercise cap...
21537929 - Adaptation of the respiratory controller contributes to the attenuation of exercise hyp...
3812269 - Limitations of dipyridamole-echocardiography in effort angina pectoris.
6853279 - Anaerobic threshold, blood lactate, and muscle metabolites in progressive exercise.
6209669 - Continuous ventricular volume assessment for diagnosis and pacemaker control.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-13
Journal Detail:
Title:  European journal of applied physiology     Volume:  -     ISSN:  1439-6327     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-1-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, ON, L8S 4K1, Canada, mitchc4@mcmaster.ca.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Modulation transfer function of intraocular collamer lens with a central artificial hole.
Next Document:  Exercise economy in African American and European American women.