You can hit them by using Hip Dominant exercises, like Deadlifts and Kettlebell Swings.
And you can also strengthen them with KNEE Dominant exercises, like this move right here:
Mini Band Donkey Kicks/Donkey Kick with Leg Extension
All you need is a small band.
HOW TO:
DONKEY KICK: Begin with wrists under shoulders, knees under hips, a band placed around the middle of your foot. Keeping a stable spine, bend your knee, flex your foot, and raise your leg so it's even with our hip- squeeze your glute here.
Progress to this one...
WITH LEG EXTENSION: Once you get to the top position, extend your leg, and re-engage your glute before re-bending and lowering.
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