PMID- 25944457
OWN - NLM
STAT- MEDLINE
DCOM- 20160622
LR  - 20181202
IS  - 1533-4287 (Electronic)
IS  - 1064-8011 (Linking)
VI  - 29
IP  - 11
DP  - 2015 Nov
TI  - Carry-Over of Force Production Symmetry in Athletes of Differing Strength Levels.
PG  - 3188-96
LID - 10.1519/JSC.0000000000000983 [doi]
AB  - This study sought to determine the level of association between bilateral force 
      production symmetry assessment methods (standing weight distribution [WtD], 
      unloaded and lightly loaded jumps, and isometric strength) and to determine 
      whether the amount of symmetry carry-over between these tasks differs for strong 
      and weak athletes. Subjects for this study included male (n = 31) and female (n = 
      32) athletes from National Collegiate Athletic Association Division I sports. 
      Athletes performed WtD, unloaded and lightly loaded (20 kg) static and 
      countermovement jumps, and isometric midthigh pull (IMTP) assessments on 2 
      adjacent force plates. Ground reaction force data were used to calculate symmetry 
      variables and performance-related variables. Using Pearson zero order 
      correlations, evaluations of the amount of symmetry carry-over were made. Weight 
      distribution correlated strongly with jump peak force (PF) (r = 0.628-0.664). 
      Strong relationships were also observed between loading conditions for jump 
      variables (r = 0.568-0.957) as were the relationships between jump types for PF, 
      peak power, and net impulse (r = 0.506-0.834). Based on the pooled sample, there 
      was a lack of association between IMTP and WtD for jump symmetry variables. 
      However, when examining strong and weak groups, rate of force development showed 
      moderate to strong symmetry carry-over in the strongest athletes (r = 
      0.416-0.589). Stronger athletes appear to display similar explosive strength 
      symmetry characteristics in dynamic and isometric assessments, unlike weaker 
      athletes. Strength seems to influence the amount of force production symmetry 
      carry-over between bilateral assessments. There may be optimal loads and 
      variables for symmetry assessment, but these may differ based on population 
      characteristics.
FAU - Bailey, Christopher A
AU  - Bailey CA
AD  - 1Department of Exercise Science, LaGrange College, LaGrange, Georgia; 2Department 
      of Exercise and Sport Sciences, Center of Excellence for Sport Science and Coach 
      Education, East Tennessee State University, Johnson City, Tennessee; and 
      3Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.
FAU - Sato, Kimitake
AU  - Sato K
FAU - Burnett, Angus
AU  - Burnett A
FAU - Stone, Michael H
AU  - Stone MH
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Strength Cond Res
JT  - Journal of strength and conditioning research
JID - 9415084
SB  - IM
MH  - Adolescent
MH  - *Athletes
MH  - *Exercise Test
MH  - Female
MH  - Humans
MH  - Isometric Contraction/physiology
MH  - Male
MH  - Muscle Strength/*physiology
MH  - Young Adult
EDAT- 2015/05/07 06:00
MHDA- 2016/06/23 06:00
CRDT- 2015/05/07 06:00
PHST- 2015/05/07 06:00 [entrez]
PHST- 2015/05/07 06:00 [pubmed]
PHST- 2016/06/23 06:00 [medline]
AID - 10.1519/JSC.0000000000000983 [doi]
PST - ppublish
SO  - J Strength Cond Res. 2015 Nov;29(11):3188-96. doi: 10.1519/JSC.0000000000000983.