Characteristics of internal oblique muscle strain in professional baseball players: a case series

Distal Abdominal Oblique Avulsion Injuries in Two Collegiate Hockey Players: A Case Report

ABSTRACT

While injuries to the abdominal oblique muscles near their origin at the lower ribs are commonly seen in sports that require explosive trunk rotational movements such as baseball and tennis, there are few reports in the literature of avulsion injuries to these muscles from their distal attachments at the iliac crest. We present the case of two collegiate male hockey players who suffered such injuries as a result of a direct impact mechanism while rotated at the waist. These injuries should be suspected when patients have significant pain in the lower abdominal region worsened by flexion and rotation of the trunk and can be accurately characterized by musculoskeletal ultrasound or MRI. With a conservative rehabilitation program focused on core, hip adductor, and hip flexor strengthening, our athletes were able to return to game participation within 6 wk of the initial injury.

Characteristics of subscapularis muscle strain in professional baseball players: a case series

BACKGROUND

Subscapularis muscle strains can develop in professional baseball players, rendering the players unable to continue playing for a certain period. However, the characteristics of this injury are not well known. The purpose of the present study was to investigate the details of the injury and the postinjury course of subscapularis muscle strain in professional baseball players.

METHODS

Of 191 players (83 fielders and 108 pitchers) who were members of a single Japanese professional baseball team between January 2013 and December 2022, 8 players (4.2%) had subscapularis muscle strain and were enrolled in this study. The diagnosis of muscle strain was made on the basis of shoulder pain and magnetic resonance imaging findings. The incidence of subscapularis muscle strain, the details of the site of the injury, and the time to return to play were examined.

RESULTS

Subscapularis muscle strain occurred in 3 (3.6%) of 83 fielders and 5 (4.6%) of 108 pitchers, with no significant difference between fielders and pitchers. All players had injuries on the dominant side. Most injuries were located at the myotendinous junction and in the inferior half of the subscapularis muscle. The mean time to return to play was 55.3 ± 40.0 (range, 7-120) days. At a mean 22.7 months after the injury, there were no reinjured players.

CONCLUSION

A subscapularis muscle strain is a rare injury among baseball players, but in players whose shoulder pain cannot be given a definite diagnosis, subscapularis muscle strain should be considered as a possible etiology.