Abstract: A physical training unit comprising a tethered ball adapted for facilitating practice of a sport swing beneath a basketball hoop. The swinging motion for sporting activities such as baseball, tennis and golf may be addressed by the suspension of a ball from a tether in a configuration simplifying both the installation, removal and retrieval of the tethered ball relative to the hoop. In the present embodiment, the tether is secured at a first, upper end to a hoop mounting means facilitating the suspension of the tether therefrom. A tubular member of defined length is inserted over the tether and permits the pivotal actuation of the tether upon impact of the ball by the user and the limited motion thereof due to interaction with the basketball hoop as well as the limited movement of a free end of the tether relative to the tubular member. In this manner, a variety of athletic swings can be practiced from a conventional basketball hoop assembly.