PMID- 20881505
OWN - NLM
STAT- MEDLINE
DCOM- 20110204
LR  - 20161018
IS  - 1533-4287 (Electronic)
IS  - 1064-8011 (Linking)
VI  - 24
IP  - 11
DP  - 2010 Nov
TI  - The relation between anthropometric and physiological variables and bat velocity 
      of high-school baseball players before and after 12 weeks of training.
PG  - 2933-43
LID - 10.1519/JSC.0b013e3181f0a76a [doi]
AB  - The purpose of this article was to investigate the relation between 
      anthropometric and physiological variables to linear bat swing velocity (BV) of 2 
      groups of high-school baseball players before and after completing a 12-week 
      periodized resistance exercise program. Participants were randomly assigned to 1 
      of 2 training groups using a stratified sampling technique. Group 1 (n = 24) and 
      group 2 (n = 25) both performed a stepwise periodized resistance exercise program 
      and took 100 swings a day, 3 d.wk-1, for 12 weeks with their normal game bat. 
      Group 2 performed additional rotational and full-body medicine ball exercises 3 
      d.wk-1 for 12 weeks. Fourteen variables were measured or calculated before and 
      after 12 weeks of training. Anthropometric and physiological variables tested 
      were height, body mass, percent body fat, lean body mass (LBM), dominant torso 
      rotational strength (DTRS) and nondominant torso rotational strength (NDTRS), 
      sequential hip-torso-arm rotational strength measured by a medicine ball hitter's 
      throw (MBHT), estimated 1 repetition maximum parallel squat (PS) and bench press 
      (BP), vertical jump (VJ), estimated peak power, angular hip velocity (AHV), and 
      angular shoulder velocity (ASV). The baseball-specific skill of linear BV was 
      also measured. Statistical analysis indicated a significant moderately high 
      positive relationship (p </= 0.05) between prelinear BV and pre-NDTRS for group 1, 
      pre-LBM, DTRS, NDTRS, peak power, and ASV for group 2; moderate positive 
      relationship between prelinear BV and preheight, LBM, DTRS, peak power, BP, PS, 
      and ASV for group 1, preheight, body mass, MBHT, BP, and PS for group 2. 
      Significantly high positive relationships were indicated between postlinear BV 
      and post-NDTRS for group 1, post-DTRS and NDTRS for group 2; moderately high 
      positive relationships between postlinear BV and post-LBM, DTRS, peak power, BP, 
      and PS for group 1, postheight, LBM, VJ, peak power for group 2; moderate 
      positive relationships between postlinear BV and postheight, body mass, MBHT, and 
      VJ for group 1, postbody mass, MBHT, BP, PS, and ASV for group 2. Significantly 
      low positive relationships were indicated between prelinear BV and prebody mass, 
      MBHT, and VJ for group 1, pre-VJ and AHV for group 2; postlinear BV and post-AHV 
      for group 2. These data show that significant relationships do exist between 
      height, body mass, LBM, rotational power, rotational strength, lower body power, 
      upper and lower body strength, AHV, and ASV to linear BV of high-school baseball 
      players. Strength coaches may want to consider using this information when 
      designing a resistance training program for high-school baseball players. Those 
      recruiting or scouting baseball players may want to use this information to 
      further develop ways of identifying talented players. However, one should be 
      cautious when interpreting this information when designing strength training 
      programs for high-school baseball players to increase linear BV.
FAU - Szymanski, David J
AU  - Szymanski DJ
AD  - Department of Kinesiology, Louisiana Tech University, Ruston, Louisiana, USA. 
      dszyman@latech.edu
FAU - Szymanski, Jessica M
AU  - Szymanski JM
FAU - Schade, Ryan L
AU  - Schade RL
FAU - Bradford, T Jason
AU  - Bradford TJ
FAU - McIntyre, Joseph S
AU  - McIntyre JS
FAU - DeRenne, Coop
AU  - DeRenne C
FAU - Madsen, Nels H
AU  - Madsen NH
LA  - eng
PT  - Journal Article
PT  - Randomized Controlled Trial
PL  - United States
TA  - J Strength Cond Res
JT  - Journal of strength and conditioning research
JID - 9415084
SB  - IM
EIN - J Strength Cond Res. 2011 Jan;25(1):286
MH  - Adipose Tissue/physiology
MH  - Adolescent
MH  - Athletic Performance/*physiology
MH  - Baseball/*physiology
MH  - Body Height/physiology
MH  - Body Mass Index
MH  - Humans
MH  - Male
MH  - Muscle Strength/physiology
MH  - Physical Fitness/*physiology
MH  - Resistance Training/methods
MH  - Skinfold Thickness
EDAT- 2010/10/01 06:00
MHDA- 2011/02/05 06:00
CRDT- 2010/10/01 06:00
PHST- 2010/10/01 06:00 [entrez]
PHST- 2010/10/01 06:00 [pubmed]
PHST- 2011/02/05 06:00 [medline]
AID - 10.1519/JSC.0b013e3181f0a76a [doi]
PST - ppublish
SO  - J Strength Cond Res. 2010 Nov;24(11):2933-43. doi: 10.1519/JSC.0b013e3181f0a76a.