| 摘要 |
A training device is disclosed that has a depressable element and an indicator element that provides a perceivable indication, for example an audible alarm, to a user when an amount of force being applied to the training device along the major axis of the training device is less than a desired amount of depressing force. In some embodiments, the training device is in the shape of a prolate sphere and approximates the size and shape of a ball typically used in American football. The training device may be configured so that no perceivable indication is provided while either little to no force is being applied to the training device along its major axis or while an adequate amount of force is being applied to the training device along the major axis thereof. |
