MARC 主機 00000nam  2200325   4500 
001    AAI3135957 
005    20051010101556.5 
008    051010s2004                        eng d 
020    0496831569 
035    (UnM)AAI3135957 
040    UnM|cUnM 
100 1  Trowbridge, Cynthia A 
245 14 The effects of strength and plyometric training on joint 
       position, joint moments, and joint stiffness at the knee 
300    188 p 
500    Source: Dissertation Abstracts International, Volume: 65-
       06, Section: B, page: 2902 
500    Adviser:  Shane Schulthies 
502    Thesis (Ph.D.)--Brigham Young University, 2004 
520    Context. Female athletes have experienced a 2 to 6 times 
       greater chance of non-contact anterior cruciate ligament 
       (ACL) injury. Previous research has indicated that 
       specific prevention training programs can reduce the 
       number of female knee injuries; however, we do not know 
       how training programs affect the specific mechanics of 
       different sport activities. Objective . To determine the 
       effects of plyometric and strength training programs on 
       the kinematics and kinetics of the knee joint throughout 
       the weight acceptance phase of running, cutting, single-
       leg hopping, and drop landing.  Design. A 2 x 3 x 3 x 6 
       factorial design was used for this randomized controlled 
       trial. The factors were time (pretest and posttest), 
       training program (control, plyometric training, and 
       traditional strength training), replication (three trials 
       for each condition), and condition (straight ahead run, 
       deceleration run, cut 45°, deceleration cut 45°, 
       drop landing, and single-leg hop).  Setting. All kinetic 
       and kinematic data were collected in the University Human 
       Performance Research Center. Participants. Thirty-six 
       healthy female college-age students with a decreased 
       ability to maintain knee joint stabilization when 
       performing functional tasks. Interventions . Separate 6-
       week plyometric and strength training programs.  Main 
       outcome measures. Average joint angles and internal joint 
       moments in the sagittal, frontal, and transverse planes 
       during the weight acceptance phase of stance. Results. The
       plyometric group increased their average flexion angle up 
       to 8° for both the drop landing and single-leg hop 
       when compared to the control (p ≤ 0.0007) and strength 
       (p ≤ 0.0006) groups. There were varied changes for the 
       joint moments in all planes with the plyometric group 
       showing the most improvements.  Conclusions. These data 
       support the role of plyometric training in improving 
       landing techniques for females 
590    School code: 0022 
590    DDC 
650  4 Health Sciences, Recreation 
650  4 Health Sciences, Rehabilitation and Therapy 
690    0575 
690    0382 
710 20 Brigham Young University 
773 0  |tDissertation Abstracts International|g65-06B 
856 40 |u