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. 2010 Nov;2(6):519-25.
doi: 10.1177/1941738110377611.

Biomechanical Considerations in the Competitive Swimmer's Shoulder

Scott A Heinlein  1 , Andrew J Cosgarea
Affiliations

Biomechanical Considerations in the Competitive Swimmer's Shoulder

Scott A Heinlein et al. Sports Health. 2010 Nov.

Abstract

Context: Competitive swimming has become an increasingly popular sport in the United States. In 2007, more than 250 000 competitive swimmers were registered with USA Swimming, the national governing body. The average competitive swimmer swims approximately 60 000 to 80 000 m per week. With a typical count of 8 to 10 strokes per 25-m lap, each shoulder performs 30 000 rotations each week. This places tremendous stress on the shoulder girdle musculature and glenohumeral joint, and it is why shoulder pain is the most frequent musculoskeletal complaint among competitive swimmers.

Evidence acquisition: Articles were obtained through a variety of medical search sources, including Medline, Google Scholar, and review articles from 1980 through January 2010.

Results: The most common cause of shoulder pain in swimmers is supraspinatus tendinopathy. Glenohumeral instability and labral tears have also been reported, but a paucity of information remains regarding prevalence and treatment in swimmers.

Conclusion: Because of the great number of stroke repetitions and force generated through the upper extremity, the shoulder is uniquely vulnerable to injury in the competitive swimmer. Comprehensive evaluation should include the entire kinetic chain, including trunk strength and core stability.

Keywords: biomechanics; swim strokes; swimmer’s shoulder.

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Conflict of interest statement

No potential conflict of interest declared.

Figures

Figure 1.
Figure 1.
Freestyle stroke cycle pull-through and recovery of the right arm during a single stroke. (Used with permission from Colwin CM. Breakthrough Swimming. Champaign, IL: Human Kinetics; 2002:50-70.)
Figure 2.
Figure 2.
Muscle activity of the freestyle stroke based on electromyographic and cinematographic analysis. (Adapted with permission from Colwin CM. Breakthrough Swimming. Champaign, IL: Human Kinetics; 2002:50-70.) Figure copyright Scott Heinlein.
Figure 3.
Figure 3.
Butterfly stroke cycle pull-through and recovery. (Used with permission from Colwin CM. Breakthrough Swimming. Champaign, IL: Human Kinetics; 2002:50-70.)
Figure 4.
Figure 4.
Backstroke cycle pull-through and recovery of the right arm. (Used with permission from Colwin CM. Breakthrough Swimming. Champaign, IL: Human Kinetics; 2002:50-70.)
Figure 5.
Figure 5.
Breaststroke cycle pull-through and recovery of the right side during a single stroke. (Used with permission from Colwin CM. Breakthrough Swimming. Champaign, IL: Human Kinetics; 2002:50-70.)
See this image and copyright information in PMC

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