| 摘要 |
A baseball bat swing trainer attaches to a baseball bat and is configured to train a batter to maintain a level swing. During training swings, the baseball bat is constrained by the baseball bat swing trainer so as to not allow the baseball bat to go below a level swing for a particular batter. The baseball bat swing trainer is attachable to a horizontal structure that is over the head of the batter and to a baseball bat. The baseball bat swing trainer includes a single-unit line controller, a line, and a baseball bat coupling connected to the line. The line controller is configured to vary and fix a working length of line defined as extending from the line controller to the baseball bat. The line may be varied in length, a working length, in order to accommodate different size batters. The line controller is configured to keep and release excess line. The baseball bat coupling is configured to be secured onto the baseball bat preferably at a location taken from a handle of the baseball bat that is approximately 50% of an overall length of the baseball bat. In operation, the fixed working length of line limits swinging of the connected baseball bat by a batter to not below a level swing of the baseball bat.
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