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PubMed1992

Patterns of shoulder flexibility among college baseball players.

In this study, I investigated and analyzed the various joint motions in the shoulders of college baseball players. Twenty-six players (age=20.38+/-1.36 yr) from two colleges were examined for upper extremity range of motion (ROM), including shoulder flexion, extension, internal rotation at 90 degrees abduction, and external rotation at 90 degrees abduction. Joint motions were measured using a JAMAR(R), six-inch, double-arm goniometer. Pitchers demonstrated 22 degrees more shoulder flexion and 21 degrees more external rotation at 90 degrees abduction than infield position players, and 17 degrees more shoulder flexion than outfield position players. There was no significant difference between the dominant arm flexibility of infield and outfield position players. When comparing the dominant to nondominant arm relative to the position, infield position players demonstrated 5 degrees less shoulder flexion and 6 degrees more external rotation on the dominant side at 90 degrees abduction. Pitchers did not demonstrate any significant difference between the dominant and nondominant arm. There was, however, an indication that pitchers had a tendency to exhibit greater flexibility during flexion and external rotation at 90 degrees abduction in the dominant side than in the nondominant side.

Journal Article↗

PubMed1993

Posterior rotator cuff strengthening using theraband(r) in a functional diagonal pattern in collegiate baseball pitchers.

The deceleration phase of the pitching mechanism requires forceful eccentric contraction of the posterior rotator cuff. Because traditional isotonic strengthening may not be specific to this eccentric pattern, a more effective and functional means of strengthening the posterior rotator cuff is needed. Twelve collegiate baseball pitchers performed a moderate intensity isotonic dumbbell strengthening routine for 6 weeks. Six of the 12 subjects were randomly assigned to an experimental group and placed on a Theraband(R) Elastic Band strengthening routine in a functional-diagonal pattern to emphasize the eccentric contraction of the posterior rotator cuff, in addition to the isotonic routine. The control group (n = 6) performed only the isotonic exercises. Both groups were evaluated on a KIN-COM(R) isokinetic dynamometer in a functional diagonal pattern. Pretest and posttest average eccentric force production of the posterior rotator cuff was compared at two speeds, 60 and 180 degrees /s. Data were analyzed with an analysis of covariance at the .05 level with significance at 60 degrees /s. Values at 180 degrees /s, however, were not significant. Eccentric force production at 60 degrees /s increased more during training in the experimental group (+19.8%) than in the control group (-1.6%). There was no difference in the two groups at 180 degrees /s; both decreased (8 to 15%). Theraband was effective at 60 degrees /s in functional eccentric strengthening of the posterior rotator cuff in the pitching shoulder.

Journal Article↗

PubMed1997

Violence in television commercials during nonviolent programming. The 1996 Major League Baseball playoffs.

OBJECTIVE: To identify the frequency of violent television commercials aired during major league baseball playoffs, traditionally thought to be a family-oriented viewing time. DESIGN AND SETTING: All 6 World Series games televised on the Fox Television Network (Fox), all 5 American League Championship Series playoff games televised by the National Broadcasting Company (NBC), and 4 first-round playoff games televised by ESPN Sports Television Network (ESPN) were videotaped in October 1996. RESULTS: During the 15 televised games reviewed, 104 (6.8%) of the 1528 commercials contained violent content. Sixty-one commercials (10 per game) that included violent interactions were noted during the World Series, 30 (6 per game) during the American League Championship Series, and 13 (3 per game) during the 4 first-round playoff games for a total of 104. In these 104 violent commercials, 69 contained at least 1 violent act, 90 contained at least 1 violent threat, and 27 contained evidence of at least 1 violent consequence. Seventy (67.3%) of the violent commercials were promotions for television programs, 7 (6.7%) were cable television program advertisements, and 20 (19.2%) were big-screen movie promotions. Twenty (71.4%) of 28 big-screen movie promotions were violent. Twenty-two (21.2%) of the 104 violent commercials and 7 "nonviolent" commercials contained blood or other graphic content, all of which were televised during the Fox presentation of the World Series. Fox also accounted for all 24 violent commercials that used a knife. Guns were involved in 25 violent commercials on NBC (5.0 per game), in 20 on Fox (3.33 per game), and in 7 on ESPN (1.75 per game). CONCLUSION: Overt violent content in commercials during the 1996 major league playoffs was common and consisted mainly of promotions for television programs and big-screen movies. It is counterintuitive to find such commercials in nonviolent programming and makes it difficult for parents to avoid exposing their children to this form of violence.

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PubMed1997