Abstract: A method of training in swinging and hitting a baseball or softball in which a mechanical training aid is provided and attached to a batter's trailing back forearm and trailing back calf with a stretchable band attached between the back forearm and back calf. The band is stretched as a batter swings with proper extension and rotation of his body. The stretched band may further cause a visual, audible, or tactilely perceived indicator to the batter or observer that a batter has properly extended during a swing.

Abstract: A swinging and hitting training aid for batters and golfers having first, second and third attachment members that attach to a person's arm, calf, and foot respectively. The training aid includes an stretchable band of resistance tubing that provides a visible indicator between the first and second attachment members. The visible indicator includes a pair of abutting sleeves that form a separable cover about the resistance tubing. The visible indicator is connected to the first attachment member by a first tether, and the second attachment member is connected to the third attachment member by a second tether. The tethers may be fixed or variable length and may include resistance tubing of greater resistance than the stretchable band of the visible indicator portion of the device.

Abstract: A swinging and hitting training aid for batters and golfers having first, second and third attachment members that attach to a person's arm, calf, and foot respectively. The training aid includes an stretchable band of resistance tubing that provides a visible indicator between the first and second attachment members. The visible indicator includes a pair of abutting sleeves that form a separable cover about the resistance tubing. The visible indicator is connected to the first attachment member by a first tether, and the second attachment member is connected to the third attachment member by a second tether. The tethers may be fixed or variable length and may include resistance tubing of greater resistance than the stretchable band of the visible indicator portion of the device.