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Revista Brasileira de Ortopedia
On-line version ISSN 1982-4378
MIYAZAKI, Alberto Naoki et al. Evaluation of painful shoulder in baseball players. Rev. bras. ortop. [online]. 2011, vol.46, n.2, pp.165-171. ISSN 1982-4378. http://dx.doi.org/10.1590/S0102-36162011000200009.
OBJECTIVE: To assess the relationship between shoulder mobility and strength and the presence of pain among baseball players. METHODS: Between April and July 2009, 55 baseball players were assessed by the Shoulder and Elbow Group of the School of Medical Sciences, Santa Casa de Misericórdia, São Paulo. They were all males, aged between 15 and 33 years (mean of 21); they attended an average of three training sessions per week and had been doing this sport for a mean of 10 years. RESULTS: 14 of the 55 players evaluated were pitchers, and 20 reported pain during the throwing motion. The mean values for lateral and medial rotation and range of motion (ROM) in the dominant shoulder were, respectively, 110º, 61º and 171º, with a statistically significant difference in relation to the non-dominant limb. Pitchers had greater gains in lateral rotation and deficits in medial rotation than did non-pitchers. Pain presented a statistically significant correlation with diminished ROM, greater length of time plating the sport and situations of "shoulder at risk". CONCLUSIONS: Statistically significant differences in dominant shoulder mobility were found, with increased lateral rotation, diminished medial rotation and smaller ROM, in relation to the contralateral limb. There was a statistically significant relationship between the pitcher's position and greater gain in lateral rotation and diminished medial rotation. There were statistically significant correlations between pain and diminished ROM, greater length of time playing the sport and situations of "shoulder at risk". There was a statistical tendency suggesting that players with diminished medial rotation of the dominant shoulder presented a relationship with pain.
Keywords : Baseball; Shoulder; Joint Range of Motion.