Once you get more advanced, you can try
the side plank variation.
Rise up into
a side plank variation, with your bottom (left) leg straight out to the side and your top (right) leg behind you, bent at 45 - degrees for support.
Strengthen your core and tone your abdominals with
this side plank variation.
In
this side plank variation, you'll feel your midsection fighting to keep your body steady.
For the lateral external obliques», this would mean two
side plank variations.