Skip Navigation LinksHome > February 2007 - Volume 21 - Issue 1 > EFFECTS OF HIGH VOLUME UPPER EXTREMITY PLYOMETRIC TRAINING O...
Journal of Strength & Conditioning Research:
ORIGINAL RESEARCH: PDF Only

EFFECTS OF HIGH VOLUME UPPER EXTREMITY PLYOMETRIC TRAINING ON THROWING VELOCITY AND FUNCTIONAL STRENGTH RATIOS OF THE SHOULDER ROTATORS IN COLLEGIATE BASEBALL PLAYERS.

CARTER, ANDREW B.; KAMINSKI, THOMAS W.; DOUEX JR, AL T.; KNIGHT, CHRISTOPHER A.; RICHARDS, JAMES G.

Collapse Box

Abstract

To achieve maximal force output, clinicians and coaches have been experimenting with upper extremity plyometric exercises for years, without sufficient scientific validation of this training method. The goal of this study was to examine the effects of an 8-week course of high volume upper extremity plyometric training on the isokinetic strength and throwing velocity of a group of intercollegiate baseball players. Twenty-four Division I collegiate baseball players (age: 19.7 +/- 1.3 years; height: 183.9 +/- 5.9 cm; mass: 90.7 +/- 10.5 kg) were recruited to participate in this study. Throwing velocity, isokinetic peak torque, isokinetic functional strength ratios, and time to peak torque were measured pre- and posttraining. Subjects were rank-ordered according to concentric internal rotation (IR) strength and were assigned randomly to either the plyometric training group (PLY) or the control group (CON). Training consisted of 6 upper extremity plyometric exercises ("Ballistic Six") performed twice per week for 8 weeks. Subjects assigned to CON performed regular off-season strength and conditioning activities, but did not perform plyometric activities. PLY demonstrated significant increases (p < 0.05) in throwing velocity following 8 weeks of training when compared with CON (83.15 mph [pre] vs. 85.15 mph [post]). There were no statistically significant differences in any of the isokinetic strength measurements between PLY and CON groups pre-to posttraining. Statistically significant differences were seen within PLY for concentric IR and eccentric external rotation (ER) isokinetic strength at 180[degrees][middle dot]s-1 and 300[degrees][middle dot]s-1; and within CON for eccentric ER isokinetic strength at 300[degrees][middle dot]s-1 and concentric IR isokinetic strength at 180[degrees][middle dot]s-1. The Ballistic Six training protocol can be a beneficial supplement to a baseball athlete's off-season conditioning by improving functional performance and strengthening the rotator cuff musculature.

(C) 2007 National Strength and Conditioning Association

 

Login

Article Tools

Share

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.