The ornamental design for a training apparatus/chair, as shown and described.
FIG. 1 is a prospective view of a training apparatus/chair according to a first embodiment of the present invention as seen from the front, top and right side thereof;
FIG. 2 is a rear view of the training apparatus/chair according to the first embodiment;
FIG. 3 is a front view of the training apparatus/chair according to the first embodiment;
FIG. 4 is a right side view of the training apparatus/chair according to the first embodiment;
FIG. 5 is a top view of the training apparatus/chair according to the first embodiment;
FIG. 6 is a bottom view of the training apparatus/chair according to the first embodiment;
FIG. 7 is a left side view of the training apparatus/chair according to the first embodiment; and,
FIG. 8 is a prospective view of a training apparatus/chair according to a second embodiment of the present invention as seen from the front, top and right side thereof.
The showing of the particular chair seat in broken lines is for illustrative purposes only and forms no part of the claimed design.