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Assessment of softball bat safety performance using mid-compression polyurethane softballs.
1B&N Softball, Inc., Cleveland, Ohio 44181, USA.
Sports Biomechanics
|November 24, 2004
Summary
Composite softball bats pose a safety risk, exceeding recommended limits for batted-ball speed. Aluminum bats, however, generally remain within safe performance parameters for slowpitch softball, aiding injury prevention.
Area of Science:
- Sports Science
- Biomechanics
- Injury Prevention
Background:
- Softball safety is debated, with batted-ball speed and pitcher reaction time as key factors.
- Batted-ball speed is the primary determinant of safe play in softball.
- Pitcher reaction time is directly correlated with batted-ball speed.
Purpose of the Study:
- To evaluate the safety of slowpitch softball by analyzing bat-ball performance.
- To compare the batted-ball speeds generated by aluminum and composite softball bats.
- To determine if current bat materials exceed established safety limits.
Main Methods:
- Tested eleven aluminum multi-wall, three aluminum single-wall, and two composite softball bats.
- Used mid-compression polyurethane softballs with an average force of 1721+/-62 N/6.4 mm.
- Measured batted-ball speeds from nine men and six women participants.
Main Results:
- Aluminum bats produced batted-ball speeds between 80-145 km/h, generally within safety limits.
- Composite bats generated higher speeds, ranging from 146-161 km/h, exceeding safety limits.
- Composite bat performance indicates a significant safety risk.
Conclusions:
- Composite softball bats present a significant safety risk due to exceeding recommended batted-ball speed limits.
- Aluminum softball bats demonstrate performance within established safety guidelines.
- This research provides crucial data for softball injury prevention strategies.