The ornamental design for a swimming brace support, as shown and described.
FIG. 1 is a side view of the swimming brace support showing my design, an opposite side view being a mirror image thereof.
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plane view thereof;
FIG. 4 is a front elevation view thereof;
FIGS. 5 and 6 are back elevation views thereof;
FIG. 7 is an upper perspective view thereof; and,
FIG. 8 is another perspective view thereof, showing environmental effects in broken lines.
The environment effects include the swimming pool, water, swimmer, and connection cord, presented in broken line format. The portions in broken lines are presented for illustrative purposes only and form no part of the claimed design.