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Pitching consecutive days in youth softball leads to pain & weakness

Popularity of softball is growing rapidly in the U.S.

Fast-pitch softball is one of the most popular and fastest growing sports among youth females, and the number of high school softball players in the U.S. is nearing that of baseball. But there is one major difference between the two sports: the mechanics of pitching a baseball and the impact it has on the body have been thoroughly studied, but research on the mechanics of the windmill pitch in softball is lacking. While it was once believed that the stress placed on the shoulder in softball is less than in baseball, recent studies have suggested that it may be more similar. The number of injuries in fast-pitch softball is also very high, but the details surrounding these injuries are poorly documented. But despite all these signs that the windmill pitching motion in softball is not as safe as previously thought, there are no pitching limitations in fast-pitch softball as there are in baseball. This means that some softball pitchers can pitch multiple games in a single day, up to three days in a row in some cases. Since research is lacking on the impact of pitching so frequently on these young pitchers' arms, a study was conducted that investigated this effect on strength, fatigue and pain related to windmill pitching in youth softball.

Data collected on youth pitchers participating in 2-day and 3-day tournaments

For the study, researchers collected data on 17 female fast-pitch softball pitchers between the ages of 14-18 years who were participating in 2-day and 3-day weekend tournaments. Before pitching, information was gathered on these participants' demographics and their history of shoulder injury or pain, as well as any other medical problems that might have had an effect on their ability to pitch. Then, at the start and end of each day of tournament play, these pitchers were assessed for fatigue, pain and strength of the shoulder and elbow in the dominant throwing arm. These values were compared at the end of each day and at the end of the tournament to determine if pitching had a negative effect on their symptoms.

Pain and fatigue are found to gradually increase over the course of the tournament

Of the 17 pitchers studied, eight participated in 3-day tournaments and six participated in 2-day tournaments. These athletes pitched in 1.5 games per day and threw 82 pitches per day, and there was a total exposure of three games pitched and 166 pitches thrown per tournament. Results showed that over the course of an average single day of tournament play, these pitchers had a significant increase in shoulder pain and fatigue, as well as a decrease in their strength. Over the course of the entire tournament, there was an even greater increase in pain and fatigue, as well as a greater decrease in their strength over this period of time. Finally, it was found that these pitchers did not recover to their baseline strength in many of the tested muscle groups by the day following pitching.

How pitch counts and physical therapy can help

These findings clearly show that windmill pitching on consecutive days leads to declines in shoulder and elbow strength that are not recovered the next day, as well as significant increases in pain and fatigue. These changes can lead to shoulder damage and increase the risk for injury in young softball players if they continue to pitch on consecutive days without regulations. This is why it has been suggested that implementing pitch counts similar to those used in baseball may address this potential problem and reduce the likelihood of injury in softball. Another possible solution to go along with pitch counts is to better prepare these young athletes for the demands of their sport with a conditioning training program provided by a physical therapist. Doing so can increase overall fitness levels and build up strength in these players so that their bodies are more capable of handling the impact of pitching regularly over the course of a softball season.

-As reported in the May '17 issue of The American Journal of Sports Medicine

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